Japanese

Hayami-Oiwa Group

Review Article

  1. ♦S. Hayami and ♦R. Yambe,
    "Stabilization mechanisms of magnetic skyrmion crystal and multiple-Q states based on momentum-resolved spin interactions"
    Mater. Today Quantum 3, 100010 (2024)
    Preprint (arXiv:2408.11206, Condensed Matter)

  2. ♦S. Hayami and H. Kusunose,
    "Unified Description of Electronic Orderings and Cross Correlations by Complete Multipole Representation"
    J. Phys. Soc. Jpn. 93, 072001 (2024)[selected in Most Cited Articles in 2025 from Vol. 93 (2024)
    JPS Hot Topics 4, 018 (2024)
    Preprint (arXiv:2403.09019, Condensed Matter)

  3. H. Kusunose and ♦S. Hayami,
    "Generalization of microscopic multipoles and cross-correlated phenomena by their orderings"
    J. Phys.: Condens. Matter 34, 464002 (2022)

  4. ♦S. Hayami and Y. Motome,
    "Topological spin crystals by itinerant frustration"
    J. Phys.: Condens. Matter 33, 443001 (2021)
    Preprint (arXiv:2103.10647, Condensed Matter)

  5. C. D. Batista, S.-Z. Lin, ♦S. Hayami, and Y. Kamiya,
    "Frustration and chiral orderings in correlated electron systems"
    Rep. Prog. Phys. 79, 084504 (2016)

Review Article [in Japanese]

  1. H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T. Arima, ♦S. Hayami, T. Nakajima, and S. Seki,
    "空間反転対称な正方晶物質GdRu2Ge2における多段階トポロジカル磁気相転移の発見"
    PF News 43(2), 11 (2025)

  2. ♦S. Hayami，R. Oiwa, ♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (10)"
    Kotai Butsuri 58(7), 357-376 (2023)

  3. ♦S. Hayami，R. Oiwa, ♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (9)"
    Kotai Butsuri 58(1), 11-30 (2023)

  4. ♦S. Hayami，♦R. Yambe,
    "Stabilization mechanism of field-direction sensitive nanometric magnetic skyrmion crystals"
    Kotai Butsuri 57(4), 281-291 (2022)

  5. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (8)"
    Kotai Butsuri 57(3), 181-201 (2022)

  6. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (7)"
    Kotai Butsuri 56(10), 507-531 (2021)

  7. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (6)"
    Kotai Butsuri 56(7), 333-353 (2021)

  8. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (5)"
    Kotai Butsuri 56(4), 171-188 (2021)

  9. ♦S. Hayami, ♦M. Yatsushiro, Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (4)"
    Kotai Butsuri 56(1), 1-19 (2021)

  10. H. Kusunose and ♦S. Hayami,
    "Generalization of microscopic multipoles and its applications to spontaneous orderings and cross-correlated phenomena"
    Kotai Butsuri 55(11), 523-534 (2020)

  11. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (3)"
    Kotai Butsuri 55(8), 379-396 (2020)

  12. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (2)"
    Kotai Butsuri 55(1), 1-11 (2020)

  13. ♦S. Hayami，♦M. Yatsushiro，Y. Yanagi，and H. Kusunose,
    "Microscopic multipole description in condensed matter physics (1)"
    Kotai Butsuri 54(3), 131-145 (2019)

  14. ♦S. Hayami，H. Kusunose，and Y. Motome,
    "Spontaneous breaking of space inversion symmetry in itinerant electron system -Unconventional multipole ordering, spin-valley splitting, and off-diagonal response-"
    Kotai Butsuri 50(5), 217-234 (2015)

Preprint

  1. ♦T. Shiro and ♦S. Hayami,
    "Spatially Dispersive Second-Harmonic Generation in Ferroaxial Systems"
    Preprint (arXiv:2607.19821, Condensed Matter)

  2. ♦T. Endo and ♦S. Hayami,
    "Microscopic Conversion of Structural Chirality into Electronic Chirality in Artificial Chiral Clusters"
    Preprint (arXiv:2607.19823, Condensed Matter)

  3. ♦Y. Takasu and ♦S. Hayami,
    "Magnetic quadrupole current generation and accumulation in noncentrosymmetric systems"
    Preprint (arXiv:2607.13680, Condensed Matter)

  4. ♦S. Kuniyoshi, ♦R. Oiwa, and ♦S. Hayami,
    "Sixteenfold Classification of Many-Body Multipoles from Rotation-Compatible Canonical Symmetries"
    Preprint (arXiv:2607.09395, Condensed Matter)

  5. ♦R. Oiwa and ♦S. Hayami,
    "Piezoaxial coupling for strain-selected ferroaxial domain control"
    Preprint (arXiv:2607.06209, Condensed Matter)

  6. S. Mandal, B. Das, H. Sharma, ♦S. Hayami, and A. Alam,
    "Topological Weyl Phase of an Ideal Spin-Gapless Semiconductor KCrSe"
    Preprint (arXiv:2606.03959, Condensed Matter)

  7. ♦A. Inda and ♦S. Hayami,
    "Antisymmetric linear transverse magnetization and ferroaxial moments induced by geometry-driven electric field gradients"
    Preprint (arXiv:2605.09966, Condensed Matter)

  8. ♦S. Kanda and ♦S. Hayami,
    "Revisiting magnetoelectric response in collinear antiferromagnetic zigzag chains: A downfolding approach beyond conventional low-energy models"
    Preprint (arXiv:2605.07118, Condensed Matter)

  9. O. Ly and ♦S. Hayami,
    "Unconventional alternating out-of-plane spin polarization in the coplanar kagome antiferromagnet"
    Preprint (arXiv:2604.11057, Condensed Matter)

  10. ♦T. Yamanaka, ♦T. Sato, and ♦S. Hayami,
    "Magnetic toroidal monopoles from relativistic polarization responses to magnetic field gradients"
    Preprint (arXiv:2604.05412, Condensed Matter)

  11. ♦T. Sato and ♦S. Hayami,
    "Thermodynamic Multipoles and Dissipative Conductivities in Metallic Systems"
    Preprint (arXiv:2603.29267, Condensed Matter)

  12. ♦A. Inda, K. Hattori, H. Kusunose, and ♦S. Hayami,
    "Antiparallel spin polarizations as quadratic response in chiral systems"
    Preprint (arXiv:2602.21718, Condensed Matter)

  13. S. Koraltan, C. Abert, M. Albrecht, M. Azhar, C. Back, H. Béa, M. T. Birch, S. Blügel, O. Boulle, F. Büttner, P. Che, V. Cros, E. Darwin, L. Desplat, C. Donnelly, H. Du, K. Everschor-Sitte, A. Fernández-Pacheco, S. Finizio, G. Finocchio, M. Garst, R. Gruber, D. Grundler, ♦S. Hayami, T. Hesjedal, A. Hoffmann, A. Hrabec, H. J. Hug, H. Jani, J. Jena, W. Jiang, J. Junquera, K. Karube, L.-M. Kern, J.-V. Kim, M. Kläui, H. Kurebayashi, K. Litzius, Y. Liu, M. Lonsky, C. H. Marrows, J. Masell, S. Mathias, Y. Mokrousov, S. S. P. Parkin, B. Pfau, P. G. Radaelli, F. Radu, R. Ramesh, N. Reyren, S. Rohart, S. Seki, I. I. Smalyukh, S. Sorn, D. Steil, D. Suess, M. Tasinkevych, Y. Tokura, R. Tomasello, V. Ukleev, H. Yang, F. S. Yasin, X. Yu, C. Zhang, S. Zhang, L. Zhao, and S. Wintz,
    "The 2026 Skyrmionics Roadmap"
    Preprint (arXiv:2601.16575, Condensed Matter)

  14. ♦T. Sato and ♦S. Hayami,
    "Orbital magnetic octupole in crystalline solids and anomalous Hall response to a nonuniform electric field"
    Preprint (arXiv:2512.24269, Condensed Matter)

  15. ♦S. Kanda and ♦S. Hayami,
    "Shape dependence of Edelstein and magnetoelectric effects in the V-shaped model"
    Preprint (arXiv:2511.14404, Condensed Matter)

  16. ♦T. Sato, ♦S. Hayami, S. Kobayashi, and Y. Asano,
    "Nonuniform superconducting states caused by odd-frequency Cooper pairs"
    Preprint (arXiv:2503.01673, Condensed Matter)

Paper

  1. ♦R. J. Laxamana and ♦S. Hayami,
    "Skyrmion generation via Laguerre-Gaussian beam irradiation in frustrated magnets"
    Phys. Rev. B 114, 014307 (2026)
    Preprint (arXiv:2603.03773, Condensed Matter)

  2. ♦Y. Xie, ♦R. Oiwa, and ♦S. Hayami,
    "Effective Phonon Models Based on Symmetry-Adapted Multipole Basis — Hidden Chiral Phonon Angular Momentum Splitting in Ferroaxial Systems"
    J. Phys. Soc. Jpn. 95, 083601 (2026)
    Preprint (arXiv:2604.23109, Condensed Matter)

  3. ♦S. Kuniyoshi, ♦R. Oiwa, and ♦S. Hayami,
    "Theory of Many-Body Multipole Operators in Single-Centered Electron Systems: Two-Body Toroidal Monopoles in Spinless Orbitals"
    J. Phys. Soc. Jpn. 95, 073704 (2026)
    Preprint (arXiv:2603.10620, Condensed Matter)

  4. ♦T. Shirato, ♦R Yambe, and ♦S. Hayami,
    "Topological phase transitions by time-dependent electromagnetic fields in frustrated magnets: Role of dynamical and static magnetic fields"
    Phys. Rev. B 113, 214435 (2026)
    Preprint (arXiv:2511.13136, Condensed Matter)

  5. P. M. Neves, T. Kurumaji, J. P. Wakefield, A. Hiess, P. Steffens, N. Qureshi, R. Cubitt, L. M DeBeer-Schmitt, J. C. Palmstrom, ♦S. Hayami, M. Bartkowiak, M. Zolliker, J. S. White, J. G. Checkelsky,
    "General Approach to Solving Spin Moiré Superstructures"
    Phys. Rev. B 16, 021054 (2026)
    Preprint (arXiv:2512.16990, Condensed Matter)

  6. ♦Y. S. Zha and ♦S. Hayami,
    "Effects of crystal field and momentum-based frustrated exchange interactions on multiorbital square skyrmion lattice"
    Phys. Rev. B 113, 174415 (2026)
    Preprint (arXiv:2511.05896, Condensed Matter)

  7. ♦Y. Xie, ♦R. Oiwa, and ♦S. Hayami,
    "Spinless electric toroidal multipoles in ferroaxial K2Zr(PO4)2 revealed by symmetry-adapted closest Wannier analysis"
    Phys. Rev. B 113, 205133 (2026)
    Preprint (arXiv:2512.17290, Condensed Matter)

  8. ♦S. Sukawa and ♦S. Hayami,
    "Nonreciprocal excitations in magnon--phonon hybrid systems: application to collinear antiferromagnets under zigzag and honeycomb structures"
    Eur. Phys. J. B 99, 60 (2026)

  9. ♦A. Kirikoshi and ♦S. Hayami,
    "Light-induced nonlinear Edelstein effect under ferroaxial ordering"
    Phys. Rev. B 113, 205108 (2026)
    Preprint (arXiv:2509.14241, Condensed Matter)

  10. ♦S. Ohgata and ♦S. Hayami,
    "Large anomalous Hall effect in double-Q magnets without net scalar spin chirality"
    Phys. Rev. B 113, L180401 (2026)
    Preprint (arXiv:2512.10168, Condensed Matter)

  11. ♦Y. Takasu and ♦S. Hayami,
    "Symmetry classification of magnetic octupole current based on multipole representation theory"
    Phys. Rev. B 113, 155138 (2026)
    Preprint (arXiv:2512.15619, Condensed Matter)

  12. P. M. Neves, T. Kurumaji, J. P. Wakefield, C. I. J. Ip, R. Cubitt, ♦S. Hayami, J. S. White, J. G. Checkelsky,
    "Cascade of Spin Moiré Superlattices with In-Plane Field in Triangle Lattice Semimetal EuAg4Sb2"
    ACS Nano 20, 14029-14038 (2026)
    Preprint (arXiv:2512.16994, Condensed Matter)

  13. R. Nakano, R. Yamada, J. Bouaziz, M. Colling, M. Gen, K. Shoriki, Y. Okamura, A. Kikkawa, R. Misawa, P. R. Baral, S. Kitou, Y. Nakamura, H. Ohsumi, Y. Tanaka, H. Sagayama, H. Nakao, Y. Ishihara, K. Gautam, O. Fabelo, Y. Taguchi, Y. Takahashi, M. Tokunaba, T.-h. Arima, Y. Tokura, R. Arita, J. Masell, ♦S. Hayami, and M. Hirschberger,
    "Perfectly harmonic spin cycloid and multi-Q textures in the Weyl semimetal GdAlSi"
    Nat. Commun. 17, 3056 (2026)
    Preprint (arXiv:2503.14768, Condensed Matter)

  14. ♦T. Sato and ♦S. Hayami,
    "Quantum theory of magnetic octupole in periodic crystals and application to d-wave altermagnets"
    npj Quantum Mater. 11, 32 (2026)
    Preprint (arXiv:2504.21431, Condensed Matter)

  15. ♦K. Okigami and ♦S. Hayami,
    "Finite-Temperature Stability of Skyrmion Crystals in Frustrated Magnets: Role of Sixfold Anisotropy and Uniform Spin Mode in Momentum Space"
    J. Phys. Soc. Jpn. 95, 044702 (2026)
    Preprint (arXiv:2511.20060, Condensed Matter)

  16. ♦K. Okigami and ♦S. Hayami,
    "Four-spin interactions as a route to multiple-Q topological magnetic order"
    Phys. Rev. B 113, 064442 (2026)
    Preprint (arXiv:2510.15158, Condensed Matter)

  17. ♦K. Uchino, ♦Y. Ogawa, and ♦S. Hayami,
    "Analysis of Spin Current Generation by Elastic Waves in f-wave Altermagnets"
    J. Phys. Soc. Jpn. 95, 034710 (2026)
    Preprint (arXiv:2508.06027, Condensed Matter)

  18. ♦S. Hayami and ♦K. Okigami,
    "Multiple-Q Spin Textures Induced by Spiral–staggered Interference in One-dimensional Itinerant Magnets"
    J. Phys. Soc. Jpn. 95, 034706 (2026)
    Preprint (arXiv:2601.09267, Condensed Matter)

  19. ♦Y. Ogawa and ♦S. Hayami,
    "Nonrelativistic Functional Properties in Collinear Antiferromagnets Based on Multipole Representation Theory"
    J. Phys. Soc. Jpn. 95, 023703 (2026)
    Preprint (arXiv:2512.03657, Condensed Matter)

  20. ♦S. Hayami, ♦R. Oiwa, and ♦A. Inda,
    "Chirality/Axiality-Induced Axiality/Chirality via Surface Polarization"
    J. Phys. Soc. Jpn. 94, 123702 (2025)
    Preprint (arXiv:2510.18209, Condensed Matter)

  21. ♦M. Yatsushiro and ♦S. Hayami,
    "Nonlinear transport and magnetoelectric effect in ferroic and antiferroic magnetic toroidal dipole orderings"
    J. Magn. Magn. Mater. 634, 173580 (2025)

  22. T. Miyamoto, M. Shimozawa, S. Hosoi, ♦M. Yatsushiro, K. Izawa, Y. Onuki, D. Aoki, and ♦S. Hayami,
    "Nonlinear Transverse Conductivity in Antiferroic Types of Magnetic Toroidal Metal"
    Phys. Rev. Lett. 135, 076502 (2025)

  23. ♦T. Yamanaka, Y. Ihara, and ♦S. Hayami,
    "Nonlinear Nonreciprocal Electric Conductivity Driven by Magnetic Field Gradients"
    J. Phys. Soc. Jpn. 94, 083705 (2025)
    Preprint (arXiv:2412.18155, Condensed Matter)

  24. ♦S. Ohgata and ♦S. Hayami,
    "Intrinsic anomalous Hall effect under anisotropic magnetic dipole versus conventional magnetic dipole"
    Phys. Rev. B 112, 014421 (2025)
    Preprint (arXiv:2412.08078, Condensed Matter)

  25. R. Oiwa, ♦A. Inda, ♦S. Hayami, T. Nomoto, R. Arita, and H. Kusunose,
    "Symmetry-adapted closest Wannier modeling based on complete multipole basis set"
    Phys. Rev. B 112, 035116 (2025)
    Preprint (arXiv:2501.10056, Condensed Matter)

  26. ♦R. Yambe and ♦S. Hayami,
    "Symmetry Rules on Multipole Interactions under Crystallographic Point Groups and Application to Multiple-Q Multipole States"
    J. Phys. Soc. Jpn. 94, 074704 (2025)
    Preprint (arXiv:2506.10358, Condensed Matter)

  27. ♦Y. Ogawa and ♦S. Hayami,
    "Nonlinear Piezomagnetic Effects in g-wave Altermagnets"
    J. Phys. Soc. Jpn. 94, 063704 (2025)
    Preprint (arXiv:2412.19158, Condensed Matter)

  28. ♦A. Kirikoshi and ♦S. Hayami,
    "Finite-q antiferrotoroidal and ferritoroidal order in a distorted kagome structure"
    Phys. Rev. B 111, L201112 (2025)
    Preprint (arXiv:2504.18093, Condensed Matter)

  29. Y. Dong, Y. Kinoshita, M. Ochi, R. Nakachi, R. Higashinaka, ♦S. Hayami, Y. Wan, Y. Arai, S. Huh, M. Hashimoto, D. Lu, M. Tokunaga, Y. Aoki, T. D. Matsuda, and T. Kondo,
    "Pseudogap and Fermi arc induced by Fermi surface nesting in a centrosymmetric skyrmion magnet"
    Science 388, 624-630 (2025)
    Preprint (arXiv:2307.08000, Condensed Matter)

  30. ♦T. Shirato, ♦R. Yambe, and ♦S. Hayami,
    "Bimeron Crystals by a Linearly Polarized AC Electric Field in Frustrated Magnets"
    J. Phys. Soc. Jpn. 94, 063601 (2025)
    Preprint (arXiv:2503.11036, Condensed Matter)

  31. ♦Y. Zha and ♦S. Hayami,
    "Square skyrmion lattice in multiorbital f-electron systems"
    Phys. Rev. B 111, 165155 (2025)
    Preprint (arXiv:2502.11765, Condensed Matter)

  32. M. Gen, Y. Fujishiro, ♦K. Okigami, ♦S. Hayami, K. Adachi, D. Hashizume, T. Kurumaji, H. Sagayama, H. Nakao, Y. Tokura, T.-h. Arima,
    "Incommensurate broken helix induced by nonstoichiometry in the axion insulator candidate EuIn2⁢As2"
    Phys. Rev. B 111, L081109 (2025)
    Preprint (arXiv:2403.03022, Condensed Matter)

  33. ♦S. Kanda and ♦S. Hayami,
    "Nonlinear frequency-asymmetric optical response in chiral systems"
    Phys. Rev. B 111, 035130 (2025)
    Preprint (arXiv:2408.10655, Condensed Matter)

  34. ♦A. Inda and ♦S. Hayami,
    "Emergent cross-product-type spin-orbit coupling under ferroaxial ordering"
    Phys. Rev. B 111, L041104 (2025)[selected in Editors' Suggestion]
    Preprint (arXiv:2410.21729, Condensed Matter)

  35. ♦S. Hayami,
    "Conversion between dipoles with different spatial parities by circularly polarized light"
    Mater. Today Quantum 5, 100019 (2025)

  36. ♦K. Okigami and ♦S. Hayami,
    "Exploring topological spin order by inverse Hamiltonian design: A new stabilization mechanism for square skyrmion crystals"
    Phys. Rev. B 110, L220405 (2024)
    Preprint (arXiv:2407.01159, Condensed Matter)

  37. ♦S. Hayami,
    "Multipole Moments Under Square Vortex and Skyrmion Crystals"
    Symmetry 16, 1451 (2024)

  38. ♦S. Hayami,
    "Antiferro skyrmion crystals consisting of skyrmion and anti-skyrmion on a bilayer square lattice"
    Discov. Appl. Sci. 6, 496 (2024)

  39. ♦S. Hayami,
    "Symmetry Classification of Antiferromagnets with Four Types of Multipoles"
    Symmetry 16, 926 (2024)

  40. ♦R. Yambe and ♦S. Hayami,
    "Dynamical generation of skyrmion and bimeron crystals by a circularly polarized electric field in frustrated magnets"
    Phys. Rev. B 110, 014428 (2024)
    Preprint (arXiv:2403.06118, Condensed Matter)

  41. ♦S. Hayami,
    "Double-Q and quadruple-Q instabilities at low-symmetric ordering wave vectors under tetragonal symmetry"
    Phys. Rev. B 110, 014404 (2024)
    Preprint (arXiv:2402.11721, Condensed Matter)

  42. ♦S. Hayami,
    "Effect of external fields and currents on electronic nematic ordering with quadrupole moments"
    J. Magn. Magn. Mater. 604, 172274 (2024)
    Preprint (arXiv:2311.16393, Condensed Matter)

  43. ♦S. Hayami,
    "Linear and nonlinear spin-current generation in polar collinear antiferromagnets without relativistic spin-orbit coupling"
    Phys. Rev. B 109, 214431 (2024)

  44. J. Spethmann, N. D. Khanh, H. Yoshimochi, R. Takagi, ♦S. Hayami, Y. Motome, R. Wiesendanger, S. Seki, K. von Bergmann,
    "SP-STM study of the multi-Q phases in GdRu2Si2"
    Phys. Rev. Mater. 8, 064404 (2024)
    Preprint (arXiv:2405.18026, Condensed Matter)

  45. ♦A. Inda, R. Oiwa, ♦S. Hayami, H. M. Yamamoto, and H. Kusunose,
    "Quantification of chirality based on electric toroidal monopole"
    J. Chem. Phys. 160, 184117 (2024)
    Preprint (arXiv:2402.13611, Condensed Matter)

  46. ♦A. Inda and ♦S. Hayami,
    "Magnetic instability under ferroaxial moment"
    Phys. Rev. B 109, 174424 (2024)
    Preprint (arXiv:2312.02444, Condensed Matter)

  47. ♦S. Hayami,
    "Field-induced transformation between triangular and square skyrmion crystals in a tetragonal polar magnet"
    Phys. Rev. B 109, 184419 (2024)
    Preprint (arXiv:2312.15587, Condensed Matter)

  48. ♦A. Kirikoshi and ♦S. Hayami,
    "Classification of Multi-Orbital Superconducting State based on Augmented Multipoles"
    Phys. Rev. B 109, 174510 (2024)
    Preprint (arXiv:2312.02410, Condensed Matter)

  49. H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T. Arima, ♦S. Hayami, T. Nakajima, and S. Seki,
    "Multistep topological transitions among meron and skyrmion crystals in a centrosymmetric magnet"
    Nat. Phys. 20, 1001–1008 (2024)
    News & Views "Metamorphosis of topological spin structures"
    Preprint (arXiv:2402.13751, Condensed Matter)

  50. ♦S. Hayami, ♦R. Yambe, and H. Kusunose,
    "Analysis of Photo-Induced Chirality and Magnetic Toroidal Moment Based on Floquet Formalism"
    J. Phys. Soc. Jpn. 93, 043702 (2024)
    Preprint (arXiv:2312.07735, Condensed Matter)

  51. ♦R. Yambe and ♦S. Hayami,
    "Scalar spin chirality induced by a circularly polarized electric field in a classical kagome magnet"
    Phys. Rev. B 109, 064428 (2024)
    Preprint (arXiv:2312.15891, Condensed Matter)

  52. ♦S. Hayami,
    "Hybrid skyrmion and anti-skyrmion phases in polar C4v systems"
    Phys. Rev. B 109, 054422 (2024)
    Preprint (arXiv:2401.04245, Condensed Matter)

  53. ♦S. Hayami,
    "Three-sublattice antiferro-type and ferri-type skyrmion crystals in magnets without the Dzyaloshinskii-Moriya interaction"
    Phys. Rev. B 109, 014415 (2024)
    Preprint (arXiv:2310.10834, Condensed Matter)

  54. D. Singh, Y. Fujishiro, ♦S. Hayami, S. H. Moody, T. Nomoto, P. R. Baral, V. Ukleev, R. Cubitt, N.-J. Steinke, D. J. Gawryluk, E. Pomjakushina, Y. Onuki, R. Arita, Y. Tokura, N. Kanazawa, and J. S. White,
    "Transition between distinct hybrid skyrmion textures through their hexagonal-to-square crystal transformation in a polar magnet"
    Nat. Commun. 14, 8050 (2023)

  55. ♦S. Hayami and K. Hattori,
    "Multiple-q Dipole-Quadrupole Instability in Spin-1 Triangular-Lattice Systems"
    J. Phys. Soc. Jpn. 92, 124709 (2023)
    Preprint (arXiv:2304.00681, Condensed Matter)

  56. ♦A. Kirikoshi and ♦S. Hayami,
    "Rotational Response Induced by Electric Toroidal Dipole"
    J. Phys. Soc. Jpn. 92, 123703 (2023)
    Preprint (arXiv:2310.15666, Condensed Matter)

  57. ♦S. Hayami and H. Kusunose,
    "Chiral Charge as Hidden Order Parameter in URu2Si2"
    J. Phys. Soc. Jpn. 92, 113704 (2023) [selected in Most Cited Articles in 2024 from Vol. 92 (2023), selected in Papers of Editors' Choice]
    JPS Hot Topics 4, 001 (2024)
    Preprint (arXiv:2304.02120, Condensed Matter)

  58. ♦S. Hayami and H. Kusunose,
    "Time-reversal switching responses in antiferromagnets"
    Phys. Rev. B 108, L140409 (2023)
    Preprint (arXiv:2306.04017, Condensed Matter)

  59. ♦S. Hayami,
    "Uniform and staggered electric axial moment in a zigzag chain"
    Phys. Rev. B 108, 094106 (2023)
    Preprint (arXiv:2307.09686, Condensed Matter)

  60. ♦S. Hayami,
    "Chern insulating state with double-Q ordering wave vectors at the Brillouin zone boundary"
    Phys. Rev. B 108, 094416 (2023)
    Preprint (arXiv:2306.15854, Condensed Matter)

  61. ♦S. Hayami,
    "Checkerboard bubble lattice formed by octuple-period quadruple-Q spin density waves"
    Phys. Rev. B 108, 094415 (2023)
    Preprint (arXiv:2307.10444, Condensed Matter)

  62. ♦S. Hayami, R. Oiwa, and H. Kusunose,
    "Unconventional Hall effect and magnetoresistance induced by metallic ferroaxial ordering"
    Phys. Rev. B 108, 085124 (2023)
    Preprint (arXiv:2306.12614, Condensed Matter)

  63. ♦R. Yambe and ♦S. Hayami,
    "Symmetry analysis of light-induced magnetic interactions via Floquet engineering"
    Phys. Rev. B 108, 064420 (2023)
    Preprint (arXiv:2303.14627, Condensed Matter)

  64. ♦S. Hayami and Y. Kato,
    "Magnetic bubble crystal in tetragonal magnets"
    Phys. Rev. B 108, 024426 (2023)
    Preprint (arXiv:2305.08333, Condensed Matter)

  65. ♦S. Hayami,
    "Antiferro Skyrmion Crystal Phases in a Synthetic Bilayer Antiferromagnet under an In-Plane Magnetic Field"
    J. Phys. Soc. Jpn. 92, 084702 (2023)
    Preprint (arXiv:2306.06882, Condensed Matter)

  66. ♦S. Hayami and ♦R. Yambe,
    "Field direction dependent skyrmion crystals in noncentrosymmetric cubic magnets: A comparison between point groups (O,T) and Td"
    Phys. Rev. B 107, 174435 (2023)
    Preprint (arXiv:2305.14619, Condensed Matter)

  67. H. Kusunose, R. Oiwa, and ♦S. Hayami,
    "Symmetry-adapted modeling for molecules and crystals"
    Phys. Rev. B 107, 195118 (2023)
    Preprint (arXiv:2303.11033, Condensed Matter)

  68. ♦R. Yambe and ♦S. Hayami,
    "Anisotropic spin model and multiple-Q states in cubic systems"
    Phys. Rev. B 107, 174408 (2023)
    Preprint (arXiv:2301.12629, Condensed Matter)

  69. ♦A. Kirikoshi and ♦S. Hayami,
    "Microscopic mechanism for intrinsic nonlinear anomalous Hall conductivity in noncollinear antiferromagnetic metals"
    Phys. Rev. B 107, 155109 (2023)
    Preprint (arXiv:2211.06817, Condensed Matter)

  70. ♦A. Inda and ♦S. Hayami,
    "Nonlinear Transverse Magnetic Susceptibility under Electric Toroidal Dipole Ordering"
    J. Phys. Soc. Jpn. 92, 043701 (2023)
    Preprint (arXiv:2212.13018, Condensed Matter)

  71. ♦S. Hayami, S. Tsutsui, H. Hanate, N. Nagasawa, Y. Yoda, and K. Matsuhira,
    "Cluster Toroidal Multipoles Formed by Electric-Quadrupole and Magnetic-Octupole Trimers: A Possible Scenario for Hidden Orders in Ca5Ir3O12"
    J. Phys. Soc. Jpn. 92, 033702 (2023)
    Preprint (arXiv:2302.03818, Condensed Matter)

  72. ♦S. Hayami and Y. Kato,
    "Widely-sweeping magnetic field-temperature phase diagrams for skyrmion-hosting centrosymmetric tetragonal magnets"
    J. Magn. Magn. Mater. 571, 170547 (2023)
    Preprint (arXiv:2209.01810, Condensed Matter)

  73. ♦S. Hayami,
    "Multiple-Q instability under fourth-order inplane single-ion anisotropy"
    J. Magn. Magn. Mater. 570, 170507 (2023)

  74. ♦R. Yambe and ♦S. Hayami,
    "Ferrochiral, antiferrochiral, and ferrichiral skyrmion crystals in an itinerant honeycomb magnet"
    Phys. Rev. B 107, 014417 (2023)
    Preprint (arXiv:2208.05115, Condensed Matter)

  75. ♦S. Hayami,
    "Stacking-dependent nonreciprocal transport in magnetic skyrmions"
    J. Magn. Magn. Mater. 568, 170420 (2023)
    Preprint (arXiv:2301.07938, Condensed Matter)

  76. ♦S. Hayami,
    "Orthorhombic distortion and rectangular skyrmion crystal in a centrosymmetric tetragonal host"
    J. Phys.: Mater. 6, 014006 (2023)

  77. ♦R. Yambe and ♦S. Hayami,
    "Effective spin model in momentum space: Toward a systematic understanding of multiple-Q instability by momentum-resolved anisotropic exchange interactions"
    Phys. Rev. B 106, 174437 (2022)
    Preprint (arXiv:2202.09744, Condensed Matter)

  78. ♦S. Hayami and H. Kusunose,
    "Magnetic Toroidal Moment under Partial Magnetic Order in Hexagonal Zigzag-Chain Compound Ce3TiBi5"
    J. Phys. Soc. Jpn. 91, 123701 (2022)
    Preprint (arXiv:2208.01754, Condensed Matter)

  79. ♦S. Hayami,
    "Zero-field skyrmion, meron, and vortex crystals in centrosymmetric hexagonal magnets"
    J. Magn. Magn. Mater. 564, 170036 (2022)

  80. K. Kobayashi and ♦S. Hayami,
    "Skyrmion and vortex crystals in the Hubbard model"
    Phys. Rev. B 106, L140406 (2022)
    Preprint (arXiv:2208.02110, Condensed Matter)

  81. ♦S. Hayami, R. Oiwa, and H. Kusunose,
    "Electric Ferro-Axial Moment as Nanometric Rotator and Source of Longitudinal Spin Current"
    J. Phys. Soc. Jpn. 91, 113702 (2022) [selected in Most Cited Articles in 2023 from Vol. 91 (2022), selected in Papers of Editors' Choice]
    JPS Hot Topics 2, 043 (2022)
    Preprint (arXiv:2111.10519, Condensed Matter)

  82. ♦S. Hayami,
    "Ferroaxial moment induced by vortex spin texture"
    Phys. Rev. B 106, 144402 (2022)[selected in Editors' Suggestion]
    Preprint (arXiv:2209.10657, Condensed Matter)

  83. ♦K. Okigami, ♦R. Yambe, and ♦S. Hayami,
    "Engineering a Skyrmion Crystal in Ferromagnetic/Antiferromagnetic Bilayers Based on Magnetic Frustration Mechanism"
    J. Phys. Soc. Jpn. 91, 103701 (2022)
    Preprint (arXiv:2207.07375, Condensed Matter)

  84. ♦M. Yatsushiro and ♦S. Hayami,
    "Mean-field Study of Antiferromagnetic and Antiferroquadrupolar Orderings in Tetragonal CeCoSi"
    J. Phys. Soc. Jpn. 91, 104701 (2022)
    Preprint (arXiv:2205.11272, Condensed Matter)

  85. ♦S. Hayami and ♦M. Yatsushiro,
    "Nonreciprocal Transport in Noncoplanar Magnetic Systems without Spin-Orbit Coupling, Net Scalar Chirality, or Magnetization"
    J. Phys. Soc. Jpn. 91, 094704 (2022)
    Preprint (arXiv:2207.11420, Condensed Matter)

  86. S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
    "Magnetic Hedgehog Lattice in a Centrosymmetric Cubic Metal"
    J. Phys. Soc. Jpn. 91, 093702 (2022)
    Preprint (arXiv:2206.03042, Condensed Matter)

  87. ♦S. Hayami,
    "Stability of Skyrmion Crystal Phase in Centrosymmetric Distorted Triangular-Lattice Antiferromagnets"
    J. Phys. Soc. Jpn. 91, 093701 (2022)
    Preprint (arXiv:2207.05862, Condensed Matter)

  88. ♦S. Hayami and ♦M. Yatsushiro,
    "Nonlinear nonreciprocal transport in antiferromagnets free from spin-orbit coupling"
    Phys. Rev. B 106, 014420 (2022)[selected in Editors' Suggestion]
    Preprint (arXiv:2207.05857, Condensed Matter)

  89. ♦S. Hayami, ♦M. Yatsushiro, and H. Kusunose,
    "Nonlinear spin Hall effect in PT-symmetric collinear magnets"
    Phys. Rev. B 106, 024405 (2022)
    Preprint (arXiv:2203.03754, Condensed Matter)

  90. ♦S. Hayami,
    "Square skyrmion crystal in centrosymmetric systems with locally inversion-asymmetric layers"
    J. Phys.: Condens. Matter 34, 365802 (2022)
    Preprint (arXiv:2206.09614, Condensed Matter)

  91. ♦S. Hayami and ♦R. Yambe,
    "Skyrmion crystal under D3h point group: Role of out-of-plane Dzyaloshinskii-Moriya interaction"
    Phys. Rev. B 105, 224423 (2022)
    Preprint (arXiv:2206.09060, Condensed Matter)

  92. ♦S. Hayami,
    "Skyrmion crystal with integer and fractional skyrmion numbers in a nonsymmorphic lattice structure with the screw axis"
    Phys. Rev. B 105, 224411 (2022)
    Preprint (arXiv:2206.04163, Condensed Matter)

  93. J. Nasu and ♦S. Hayami,
    "Antisymmetric Thermopolarization by Electric Toroidicity"
    Phys. Rev. B 105, 245125 (2022)
    Preprint (arXiv:2112.06387, Condensed Matter)

  94. ♦S. Hayami,
    "Rectangular and square skyrmion crystals on a centrosymmetric square lattice with easy-axis anisotropy"
    Phys. Rev. B 105, 174437 (2022)
    Preprint (arXiv:2205.09236, Condensed Matter)

  95. ♦S. Hayami,
    "Multifarious skyrmion phases on a trilayer triangular lattice"
    Phys. Rev. B 105, 184426 (2022)
    Preprint (arXiv:2205.08004, Condensed Matter)

  96. ♦S. Hayami and ♦M. Yatsushiro,
    "Spin Conductivity Based on Magnetic Toroidal Quadrupole Hidden in Antiferromagnets"
    J. Phys. Soc. Jpn. 91, 063702 (2022)
    Preprint (arXiv:2204.07326, Condensed Matter)

  97. ♦M. Yatsushiro, R. Oiwa, H. Kusunose, and ♦S. Hayami,
    "Analysis of model-parameter dependences on the second-order nonlinear conductivity in PT-symmetric collinear antiferromagnetic metals with magnetic toroidal moment on zigzag chains"
    Phys. Rev. B 105, 155157 (2022)
    Preprint (arXiv:2109.14132, Condensed Matter)

  98. R. Takagi, N. Matsuyama, V. Ukleev, L. Yu, J. S. White, S. Francoual, J. R. L. Mardegan, ♦S. Hayami, H. Saito, K. Kaneko, K. Ohishi, Y. Onuki, T. Arima, Y. Tokura, T. Nakajima, and S. Seki,
    "Square and rhombic lattices of magnetic skyrmions in a centrosymmetric binary compound"
    Nat. Commun. 13, 1472 (2022)

  99. ♦S. Hayami and ♦R. Yambe,
    "Helicity locking of a square skyrmion crystal in a centrosymmetric lattice system without vertical mirror symmetry"
    Phys. Rev. B 105, 104428 (2022)
    Preprint (arXiv:2203.08333, Condensed Matter)

  100. ♦S. Hayami,
    "Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy"
    J. Magn. Magn. Mater. 553, 169220 (2022)
    Preprint (arXiv:2202.12964, Condensed Matter)

  101. N. D. Khanh, T. Nakajima, ♦S. Hayami, S. Gao, Y. Yamasaki, H. Sagayama, H. Nakao, R. Takagi, Y. Motome, Y. Tokura, T. Arima, S. Seki,
    "Zoology of Multiple-Q Spin Textures in a Centrosymmetric Tetragonal Magnet with Itinerant Electrons"
    Adv. Sci. 9, 2105452 (2022)
    Preprint (arXiv:2201.06237, Condensed Matter)

  102. ♦S. Hayami,
    "Multiple Skyrmion Crystal Phases by Itinerant Frustration in Centrosymmetric Tetragonal Magnets"
    J. Phys. Soc. Jpn. 91, 023705 (2022)[selected in Most Cited Articles in 2023 from Vol. 91 (2022)]
    Preprint (arXiv:2201.02326, Condensed Matter)

  103. ♦S. Hayami,
    "Mechanism of antisymmetric spin polarization in centrosymmetric multiple-Q magnets based on effective chiral bilinear and biquadratic spin cross products"
    Phys. Rev. B 105, 024413 (2022)
    Preprint (arXiv:2201.01354, Condensed Matter)

  104. ♦S. Hayami,
    "Skyrmion crystal and spiral phases in centrosymmetric bilayer magnets with staggered Dzyaloshinskii-Moriya interaction"
    Phys. Rev. B 105, 014408 (2022)
    Preprint (arXiv:2112.07072, Condensed Matter)

  105. ♦S. Hayami and ♦T. Matsumoto,
    "Essential model parameters for nonreciprocal magnons in multisublattice systems"
    Phys. Rev. B 105, 014404 (2022)
    Preprint (arXiv:2112.07071, Condensed Matter)

  106. Y. Kato, ♦S. Hayami and Y. Motome,
    "Spin excitation spectra in helimagnetic states: Proper-screw, cycloid, vortex crystal, and hedgehog lattice"
    Phys. Rev. B 104, 224405 (2021)
    Preprint (arXiv:2109.05628, Condensed Matter)

  107. ♦S. Hayami and ♦R. Yambe,
    "Locking of skyrmion cores on a centrosymmetric discrete lattice: Onsite versus offsite"
    Phys. Rev. Research 3, 043158 (2021)
    Preprint (arXiv:2107.03500, Condensed Matter)

  108. ♦S. Hayami, T. Okubo, and Y. Motome,
    "Phase Shift in Skyrmion Crystals"
    Nat. Commun. 12, 6927 (2021)
    Preprint (arXiv:2005.03168, Condensed Matter)

  109. ♦S. Hayami,
    "Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets"
    New J. Phys. 23, 113032 (2021)
    Preprint (arXiv:2111.03202, Condensed Matter)

  110. ♦T. Matsumoto and ♦S. Hayami,
    "Nonreciprocal magnon excitations by the Dzyaloshinskii-Moriya interaction on the basis of bond magnetic toroidal multipoles"
    Phys. Rev. B 104, 134420 (2021)
    Preprint (arXiv:2107.12743, Condensed Matter)

  111. ♦S. Hayami and Y. Motome,
    "Charge density waves in multiple-Q spin states"
    Phys. Rev. B 104, 144404 (2021)
    Preprint (arXiv:2108.04997, Condensed Matter)

  112. ♦S. Hayami and ♦R. Yambe,
    "Meron-antimeron crystals in noncentrosymmetric itinerant magnets on a triangular lattice"
    Phys. Rev. B 104, 094425 (2021)
    Preprint (arXiv:2107.03501, Condensed Matter)

  113. ♦M. Yatsushiro, H. Kusunose, and ♦S. Hayami,
    "Multipole classification in 122 magnetic point groups for unified understanding of multiferroic responses and transport phenomena"
    Phys. Rev. B 104, 054412 (2021)
    Preprint (arXiv:2105.12890, Condensed Matter)

  114. ♦S. Hayami and H. Kusunose,
    "Spin-orbital-momentum locking under odd-parity magnetic quadrupole ordering"
    Phys. Rev. B 104, 045117 (2021)
    Preprint (arXiv:2105.09444, Condensed Matter)

  115. ♦S. Hayami,
    "In-plane magnetic field-induced skyrmion crystal in frustrated magnets with easy-plane anisotropy"
    Phys. Rev. B 103, 224418 (2021)

  116. ♦S. Hayami and ♦R. Yambe,
    "Field-Direction Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to 4f-Electron Compound EuPtSi"
    J. Phys. Soc. Jpn. 90, 073705 (2021) [selected in Most Cited Articles in 2022 from Vol. 90 (2021), selected in Papers of Editors' Choice]
    JPS Hot Topics 1, 048 (2021)
    Preprint (arXiv:2106.00113, Condensed Matter)

  117. ♦R. Yambe and ♦S. Hayami,
    "Skyrmion crystals in centrosymmetric itinerant magnets without horizontal mirror plane"
    Sci. Rep. 11, 11184 (2021)

  118. ♦S. Hayami and H. Kusunose,
    "Essential role of anisotropic magnetic dipole in anomalous Hall effect"
    Phys. Rev. B 103, L180407 (2021)
    Preprint (arXiv:2104.07964, Condensed Matter)

  119. ♦S. Hayami,
    "Electronic Nematic Ordering Driven by Atomic-scale Multipoles"
    JPS Hot Topics 1, 035 (2021)

  120. ♦S. Hayami,
    "Rich Electronic Nematic Orderings Realized by Atomic-scale Electric Quadrupoles"
    JPSJ News Comments 18, 06 (2021)

  121. H. Hanate, T. Hasegawa, ♦S. Hayami, S. Tsutsui, S. Kawano, and K. Matsuhira,
    "First Observation of Superlattice Reflections in the Hidden Order at 105 K of Spin-Orbit Coupled Iridium Oxide Ca5Ir3O12"
    J. Phys. Soc. Jpn. 90, 063702 (2021) [selected in Most Cited Articles in 2022 from Vol. 90 (2021), selected in Papers of Editors' Choice]
    JPS Hot Topics 1, 042 (2021)

  122. S. Seo, ♦S. Hayami, Y. Su, S. M. Thomas, F. Ronning, E. D. Bauer, J. D. Thompson, S.-Z. Lin, and P. F. S. Rosa,
    "Spin-texture-driven electrical transport in multi-Q antiferromagnets"
    Commun. Phys. 4, 58 (2021)

  123. M. Hirschberger, ♦S. Hayami, and Y. Tokura,
    "Nanometric skyrmion lattice from anisotropic exchange interactions in a centrosymmetric host"
    New J. Phys. 23, 023039 (2021)

  124. ♦S. Hayami and Y. Motome,
    "Noncoplanar multiple-Q spin textures by itinerant frustration: Effects of single-ion anisotropy and bond-dependent anisotropy"
    Phys. Rev. B 103, 054422 (2021)
    Preprint (arXiv:2011.13040, Condensed Matter)

  125. ♦S. Hayami and Y. Motome,
    "Square skyrmion crystal in centrosymmetric itinerant magnets"
    Phys. Rev. B 103, 024439 (2021)
    Preprint (arXiv:2010.14671, Condensed Matter)

  126. ♦M. Yatsushiro and ♦S. Hayami,
    "NQR and NMR spectra in odd-parity multipole material CeCoSi"
    Phys. Rev. B 102, 195147 (2020)
    Preprint (arXiv:2011.06212, Condensed Matter)

  127. Y. Yasui, C. J. Butler, N. D. Khanh, ♦S. Hayami, T. Nomoto, T. Hanaguri, Y. Motome, R. Arita, T.-h. Arima, Y. Tokura, and S. Seki,
    "Imaging the coupling between itinerant electrons and localised moments in the centrosymmetric skyrmion magnet GdRu2Si2"
    Nat. Commun. 11, 5925 (2020)
    Preprint (arXiv:2011.00785, Condensed Matter)

  128. ♦S. Hayami, Y. Yanagi, and H. Kusunose,
    "Bottom-up design of spin-split and reshaped electronic band structures in antiferromagnets without spin-orbit coupling: Procedure on the basis of augmented multipoles"
    Phys. Rev. B 102, 144441 (2020)
    Preprint (arXiv:2008.10815, Condensed Matter)

  129. H. Kusunose, R. Oiwa, and ♦S. Hayami,
    "Complete Multipole Basis Set for Single-Centered Electron Systems"
    J. Phys. Soc. Jpn. 89, 104704 (2020)
    Preprint (arXiv:2007.08039, Condensed Matter)

  130. ♦S. Hayami and ♦R. Yambe,
    "Degeneracy Lifting of Neel, Bloch, and Anti-Skyrmion Crystals in Centrosymmetric Tetragonal Systems"
    J. Phys. Soc. Jpn. 89, 103702 (2020)
    Preprint (arXiv:2009.06821, Condensed Matter)

  131. M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, and H. Seo,
    "Anomalous Hall effect in κ-type organic antiferromagnets"
    Phys. Rev. B 102, 075112 (2020)
    Preprint (arXiv:2004.04578, Condensed Matter)

  132. ♦S. Hayami,
    "Multiple-Q magnetism by anisotropic bilinear-biquadratic interactions in momentum space"
    J. Magn. Magn. Mater. 513, 167181 (2020)

  133. ♦T. Matsumoto and ♦S. Hayami,
    "Nonreciprocal magnons due to symmetric anisotropic exchange interaction in honeycomb antiferromagnets"
    Phys. Rev. B 101, 224419 (2020)
    Preprint (arXiv:2005.13729, Condensed Matter)

  134. ♦S. Hayami, Y. Yanagi, and H. Kusunose,
    "Spontaneous antisymmetric spin splitting in noncollinear antiferromagnets without spin-orbit coupling"
    Phys. Rev. B 101, 220403(R) (2020)
    Preprint (arXiv:2001.05630, Condensed Matter)

  135. S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
    "Magnetic hedgehog lattices in noncentrosymmetric metals"
    Phys. Rev. B 101, 144416 (2020)
    Preprint (arXiv:1908.05044, Condensed Matter)

  136. Y. Su, ♦S. Hayami, and S.-Z. Lin,
    "Dimension transcendence and anomalous charge transport in magnets with moving multiple-Q spin textures"
    Phys. Rev. Research 2, 013160 (2020)
    Preprint (arXiv:1904.05473, Condensed Matter)

  137. ♦M. Yatsushiro and ♦S. Hayami,
    "Odd-Parity Multipoles by Staggered Magnetic Dipole and Electric Quadrupole Orderings in CeCoSi"
    J. Phys. Soc. Jpn. 89, 013703 (2020)
    Preprint (arXiv:1912.02422, Condensed Matter)

  138. ♦R. Yambe and ♦S. Hayami,
    "Double-Q Chiral Stripe in the d–p Model with Strong Spin–Charge Coupling"
    J. Phys. Soc. Jpn. 89, 013702 (2020)
    Preprint (arXiv:1912.03906, Condensed Matter)

  139. ♦S. Hayami, Y. Yanagi, and H. Kusunose,
    "Momentum-Dependent Spin Splitting by Collinear Antiferromagnetic Ordering"
    J. Phys. Soc. Jpn. 88, 123702 (2019)
    Preprint (arXiv:1908.08680, Condensed Matter)

  140. M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, and H. Seo,
    "Spin current generation in organic antiferromagnets"
    Nat. Commun. 10, 4305 (2019) [selected in Editors' Highlights]
    Preprint (arXiv:1902.02506, Condensed Matter)

  141. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Magnetic Vortex Induced by Nonmagnetic Impurity in Ferromagnets: Magnetic Multipole and Toroidal around the Vacancy"
    J. Phys. Soc. Jpn. 88, 063702 (2019)
    Preprint (arXiv:1905.07669, Condensed Matter)

  142. M.-T. Suzuki, T. Nomoto, R. Arita, Y. Yanagi, ♦S. Hayami, and H. Kusunose,
    "Multipole expansion for magnetic structures: A generation scheme for symmetry-adapted orthonormal basis set in crystallographic point group"
    Phys. Rev. B 99, 174407 (2019) [selected in Editors' Suggestion]
    Preprint (arXiv:1902.10819, Condensed Matter)

  143. ♦M. Yatsushiro and ♦S. Hayami,
    "Atomic-Scale Magnetic Toroidal Dipole under Odd-Parity Hybridization"
    J. Phys. Soc. Jpn. 88, 054708 (2019)
    Preprint (arXiv:1903.04708, Condensed Matter)

  144. ♦S. Hayami, Y. Yanagi, H. Kusunose, and Y. Motome,
    "Electric Toroidal Quadrupoles in Spin-Orbit-Coupled Metal Cd2Re2O7"
    Phys. Rev. Lett. 122, 147602 (2019) [selected as Cover image and PDF FILE]
    Preprint (arXiv:1812.01249, Condensed Matter)

  145. ♦S. Hayami and Y. Motome,
    "Effect of magnetic anisotropy on Skyrmions with a high topological number in itinerant magnets"
    Phys. Rev. B 99, 094420 (2019)
    Preprint (arXiv:1811.11336, Condensed Matter)

  146. R. Takagi, J. S. White, ♦S. Hayami, R. Arita, D. Honecker, H. M. Rønnow, Y. Tokura, and S. Seki,
    "Multiple-q noncollinear magnetism in an itinerant hexagonal magnet"
    Sci. Adv. 4, eaau3402 (2018)

  147. ♦S. Hayami, ♦M. Yatsushiro, Y. Yanagi, and H. Kusunose,
    "Classification of atomic-scale multipoles under crystallographic point groups and application to linear response tensors"
    Phys. Rev. B 98, 165110 (2018) [selected in Editors' Suggestion]
    Preprint (arXiv:1806.01964, Condensed Matter)

  148. ♦S. Hayami and Y. Motome,
    "Néel- and Bloch-Type Magnetic Vortices in Rashba Metals"
    Phys. Rev. Lett. 121, 137202 (2018) [selected as Cover image and PDF FILE]
    Preprint (arXiv:1803.01543, Condensed Matter)

  149. ♦S. Hayami and H. Kusunose,
    "Microscopic Description of Electric and Magnetic Toroidal Multipoles in Hybrid Orbitals"
    J. Phys. Soc. Jpn. 87, 033709 (2018) [selected in Most Cited Articles in 2019 from Vol. 87 (2018), selected in 27th Outstanding Paper Award of the Physical Society of Japan]
    Preprint (arXiv:1712.02927, Condensed Matter)

  150. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Emergent odd-parity multipoles and magnetoelectric effects on a diamond structure: implication to 5d transition metal oxides AOsO4 (A= K, Rb, and Cs)"
    Phys. Rev. B 97, 024414 (2018)
    Preprint (arXiv:1711.09507, Condensed Matter)

  151. Y. Yanagi, ♦S. Hayami, and H. Kusunose,
    "Manipulating magnetoelectric effect -- Essence learned from Co4Nb2O9"
    Phys. Rev. B 97, 020404 (2018)
    Preprint (arXiv:1712.03918, Condensed Matter)

  152. R. Ozawa, ♦S. Hayami, K. Barros, and Y. Motome,
    "Shape of magnetic domain walls formed by coupling to mobile charges"
    Phys. Rev. B 96, 094417 (2017)
    Preprint (arXiv:1609.07189, Condensed Matter)

  153. ♦S. Hayami, R. Ozawa, and Y. Motome,
    "Effective bilinear-biquadratic model for noncoplanar ordering in itinerant magnets"
    Phys. Rev. B 95, 224424 (2017), erratum [selected in Kaleidoscopes]
    Preprint (arXiv:1703.07690, Condensed Matter)

  154. R. Ozawa, ♦S. Hayami, and Y. Motome,
    "Zero-Field Skyrmions with a High Topological Number in Itinerant Magnets"
    Phys. Rev. Lett. 118, 147205 (2017)
    Preprint (arXiv:1703.03227, Condensed Matter)

  155. ♦S. Hayami, S.-Z. Lin, Y. Kamiya, and C. D. Batista,
    "Vortices, skyrmions, and chirality waves in frustrated Mott insulators with a quenched periodic array of impurities"
    Phys. Rev. B 94, 174420 (2016)
    Preprint (arXiv:1607.07100, Condensed Matter)

  156. R. Ozawa, ♦S. Hayami, K. Barros, G. W. Chern, Y. Motome, and C. D. Batista,
    "Vortex Crystals with Chiral Stripes in Itinerant Magnets"
    J. Phys. Soc. Jpn. 85, 103703 (2016)
    Preprint (arXiv:1510.06830, Condensed Matter)

  157. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Emergent spin-valley-orbital physics by spontaneous parity breaking"
    J. Phys.: Condens. Matter 28, 395601 (2016)
    Preprint (arXiv:1607.05782, Condensed Matter)

  158. ♦S. Hayami, R. Ozawa, and Y. Motome,
    "Engineering chiral density waves and topological band structures by multiple-Q superpositions of collinear up-up-down-down orders"
    Phys. Rev. B 94, 024424 (2016)
    Preprint (arXiv:1603.06646, Condensed Matter)

  159. ♦S. Hayami, S.-Z. Lin, and C. D. Batista,
    "Bubble and skyrmion crystals in frustrated magnets with easy-axis anisotropy"
    Phys. Rev. B 93, 184413 (2016)
    Preprint (arXiv:1601.02064, Condensed Matter)

  160. S.-Z. Lin, ♦S. Hayami, and C. D. Batista,
    "Magnetic Vortex Induced by Nonmagnetic Impurity in Frustrated Magnets"
    Phys. Rev. Lett. 116, 187202 (2016)

  161. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Asymmetric Magnon Excitation by Spontaneous Toroidal Ordering"
    J. Phys. Soc. Jpn. 85, 053705 (2016)
    Preprint (arXiv:1508.05627, Condensed Matter)

  162. S.-Z. Lin and ♦S. Hayami,
    "Ginzburg-Landau theory for skyrmions in inversion-symmetric magnets with competing interactions"
    Phys. Rev. B 93, 064430 (2016)
    Preprint (arXiv:1512.05012, Condensed Matter)

  163. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Spontaneous multipole ordering by local parity mixing"
    J. Phys. Soc. Jpn. 84, 064717 (2015)
    Preprint (arXiv:1502.00057, Condensed Matter)

  164. ♦S. Hayami and Y. Motome,
    "Topological semimetal-to-insulator phase transition between noncollinear and noncoplanar multiple-Q states on a square-to-triangular lattice"
    Phys. Rev. B 91, 075104 (2015)
    Preprint (arXiv:1412.0752, Condensed Matter)

  165. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Spontaneous parity breaking in spin-orbital coupled systems"
    Phys. Rev. B 90, 081115(R) (2014)
    Preprint (arXiv:1406.2093, Condensed Matter)

  166. ♦S. Hayami and Y. Motome,
    "Multiple-Q instability by (d-2)-dimensional connections of Fermi surfaces"
    Phys. Rev. B 90, 060402(R) (2014)
    Preprint (arXiv:1406.3119, Condensed Matter)

  167. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Toroidal order in metals without local inversion symmetry"
    Phys. Rev. B 90, 024432 (2014) [selected in Editors' Suggestion]
    Preprint (arXiv:1404.1156, Condensed Matter)

  168. ♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
    "Three-dimensional Dirac electrons on a cubic lattice with noncoplanar multiple-Q order"
    Phys. Rev. B 89, 085124 (2014)
    Preprint (arXiv:1305.5031, Condensed Matter)

  169. ♦S. Hayami, M. Udagawa, and Y. Motome,
    "Partial Disorder and Metal-Insulator Transition in the Periodic Anderson Model on a Triangular Lattice"
    J. Phys. Soc. Jpn. 81,103707 (2012)
    Preprint (arXiv:1208.4691, Condensed Matter)

  170. ♦S. Hayami, M. Udagawa, and Y. Motome,
    "Partial Disorder in the Periodic Anderson Model on a Triangular Lattice"
    J. Phys. Soc. Jpn. 80, 073704 (2011)
    Preprint(arxiv:1105.3271, Condensed Matter)

Proceedings

  1. S. Tsutsui, H. Hanate, K. Kadohiro, T. Honda, R. Masuda, N. Nagasawa, Y. Yoda, ♦S. Hayami, H. Harima, and K. Matsuhira,
    "Successive transitions in Ca5Ir3O12 revealed by 193Ir synchrotron-radiation-based Mössbauer spectroscopy"
    Interactions 247, 5 (2026)

  2. ♦S. Hayami,
    "Uniaxial Distortion Effect on Magnetic Skyrmion Crystals in a Frustrated Triangular-Lattice System"
    JPS Conf. Proc. 38, 011153 (2023)

  3. ♦M. Yatsushiro and ♦S. Hayami,
    "Antisymmetric Spin–Orbit Interaction in a Locally Noncentrosymmetric CeFeSi-Type Structure"
    JPS Conf. Proc. 30, 011151 (2020)

  4. ♦S. Hayami, Y. Yanagi, M. Naka, H. Seo, Y. Motome, H. Kusunose,
    "Multipole Description of Emergent Spin–Orbit Interaction in Organic Antiferromagnet 𝜅-(BEDT-TTF)2Cu[N(CN)2]Cl"
    JPS Conf. Proc. 30, 011149 (2020)

  5. S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
    "Tracing Monopoles and Anti-monopoles in a Magnetic Hedgehog Lattice"
    JPS Conf. Proc. 30, 011010 (2020)

  6. ♦S. Hayami and Y. Motome,
    "Multiple-Q Magnetic States in Spin-Orbit Coupled Metals"
    IEEE Transactions on Magnetics 55, 1500107 (2018)

  7. Y. Yanagi, ♦S. Hayami, and H. Kusunose,
    "Theory of magnetoelectric response in Co4Nb2O9"
    Physica B: Condensed Matter 536, 107-110 (2018)

  8. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Mean-field study of correlation-induced antisymmetric spin-orbit coupling in a two-orbital honeycomb model"
    Physica B: Condensed Matter 536, 649-653 (2018)

  9. Y. Sugita, ♦S. Hayami, and Y. Motome,
    "Antisymmetric Spin-Orbit Coupling in a d-p Model on a Zigzag Chain"
    Physics Procedia 75, 419-425 (2015)

  10. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Toroidal order in a partially disordered state on a layered triangular lattice: implication to UNi4B"
    J. Phys.: Conf. Ser. 592, 012101 (2015)
    Preprint (arXiv:1409.3657, Condensed Matter)

  11. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Quantum spin Hall effect in a two-orbital model on a honeycomb lattice"
    J. Phys.: Conf. Ser. 592, 012131 (2015)
    Preprint (arXiv:1409.2142, Condensed Matter)

  12. ♦S. Hayami, T. Misawa, and Y. Motome,
    "Charge Order with a Noncoplanar Triple-Q Magnetic Order on a Cubic Lattice"
    JPS Conf. Proc. 3, 016016 (2014)
    Preprint (arXiv:1310.1982, Condensed Matter)

  13. ♦S. Hayami, M. Udagawa, and Y. Motome,
    "Carrier doping to a partially disordered state in the periodic Anderson model on a triangular lattice"
    J. Phys.: Conf. Ser. 400, 032018 (2012)
    Preprint (arXiv:1107.4401, Condensed Matter)