Japanese

Hayami-Oiwa Group

Poster presentation

International Conference (Invited Talk)

  1. ♦S. Hayami,
    "Stabilization mechanisms of topological spin textures in itinerant magnets",
    The 16th Asia Pacific Physics Conference (APPC16), Haikou, China (10/20-24 2025)

  2. ♦S. Hayami,
    "Multipole description of altermagnetism",
    International Symposium on Spintronics with Antiferromagnets and Altermagnets, Hakone, Japan (10/7-9 2025)

  3. ♦S. Hayami,
    "Altermagnetism viewed from multipole representation",
    Brainstorming Workshop Roadmap for Altermagnetism, NJIT, United States (1/8-10 2025)

  4. ♦S. Hayami,
    "Cross-correlation phenomena in antiferromagnets based on multipole representation",
    ISSP Theory mini-Workshop "Correlated Quantum Materials + beyond", ISSP, Japan (11/18-29 2024)

  5. ♦S. Hayami,
    "Cross-correlation phenomena in antiferromagnets based on multipole representation",
    APW-RIKEN-Tsinghua-Kavli workshop "Highlights on condensed matter physics", RIKEN, Japan (11/1-3 2024)

  6. ♦S. Hayami,
    "Cross-correlation phenomena in antiferromagnets with magnetic toroidal monopole, dipole, and quadrupole",
    The 15th APCTP workshop on multiferroics, Seoul, South Korea (8/22-24 2024)

  7. ♦S. Hayami,
    "Chiral magnetic textures in itinerant magnets",
    APS March Meeting 2023, K54.00001, Las Vegas, Nevada, United States (3/5-10 2023)

  8. ♦S. Hayami,
    "Skyrmion crystals in centrosymmetric magnets",
    Young Leaders Workshop: Emerging Quantum Spintronics, online (1/19 2022)

  9. ♦S. Hayami,
    "Mechanisms of square and triangular skyrmion crystals",
    International Conference on Frustration, Topology, and Spin Textures, Kobe International Conference Center, Hyogo, Japan (12/22-23 2021)

  10. ♦S. Hayami,
    "Classification of atomic-scale multipoles under magnetic point groups and application to multiferroic phenomena",
    The 12th APCTP Workshop on Multiferroics, online (11/15-17 2021)

  11. ♦S. Hayami,
    "Bottom-up design of momentum-dependent spin-split band structures in spin-orbit-coupling free antiferromagnets",
    New Trends in Quantum Condensed Matter Theory 2021, online (7/26-30 2021)

  12. ♦S. Hayami,
    "Atomic-scale augmented multipoles",
    Online international workshop "Recent Developments on Multipole Moments in Quantum Systems" (5/11-12 2020)

  13. ♦S. Hayami,
    "Classification of Atomic-Scale Multipoles under Crystallographic Point Groups",
    The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/23-28 2019)

  14. ♦S. Hayami,
    "Momentum-Dependent Spin Splitting by Collinear Antiferromagnets without Atomic Spin-Orbit Coupling",
    J-Physics 2019 International Conference & KINKEN-WAKATE 2019 Multipole Physics, Kobe University, Hyogo, Japan (9/17-21 2019)

  15. ♦S. Hayami,
    "Augmented multipoles and cross-correlated couplings",
    J-Physics 2019 International Conference & KINKEN-WAKATE 2019 Multipole Physics, Tutorial session (Lecture) , Kobe University, Hyogo, Japan (9/17-21 2019)

  16. ♦S. Hayami,
    "Neel- and Bloch-type magnetic vortices in Rashba metals",
    SPIE Optics + Photonics 2019, Spintronics XII 11090-69, San Diego Convention Center, California, United States (8/11-15 2019)

  17. ♦S. Hayami,
    "Magnetic vortex and skyrmion crystals in frustrated magnets",
    International workshop Frontiers in Strongly Correlated Electron System, Hokkaido University, Hokkaido, Japan (10/19-20 2017)

  18. ♦S. Hayami,
    "Emergent odd-parity multipoles by spontaneous parity breaking",
    J-Physics 2017: International Workshop on Multipole Physics and Related Phenomena, Hachimantai, Iwate, Japan (9/25-28 2017)

  19. ♦S. Hayami,
    "Vortex and Skyrmion Crystals in Frustrated Itinerant Magnets",
    Skyrmionics: Materials, Phenomena and Applications, Santa Fe, New Mexico, United States (8/7-10 2017)

  20. ♦S. Hayami,
    "Spontaneous cluster multipoles by local parity mixing",
    The International Conference on SCES 2017, S30, Prague, Czech (7/17-21 2017)

  21. ♦S. Hayami,
    "Emergent spin-valley-orbital physics by cluster multipoles",
    EMN Bali Meeting 2017, A15, Kuta, Bali, Indonesia (6/21-24 2017)

  22. ♦S. Hayami,
    "Toroidal order in metals without local inversion symmetry",
    Trends in Theory of Correlated Materials, M-9, Shibuya-Campus, Aoyama Gakuin University, Tokyo, Japan (10/5-8 2014)

International Conference (Oral)

  1. R. Nakano, R. Yamada, J. Bouaziz, M. Colling, M. Gen, K. Shoriki, Y. Okamura, A. Kikkawa, H. Ohsumi, Y. Tanaka, H. Sagayama, H. Nakao, Y. Ishihara, K. Gautam, O. Fabelo, Y. Taguchi, Y. Takahashi, M. Tokunaga, 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",
    APS Global Physics Summit 2026, Denver, Colorado, United States (3/15-20 2026)

  2. P. Neves, T. Kurumaji, J. Wakefield, C. I. Jess, Ip J. Paddison, L. DeBeer-Schmitt, R. Cubitt, A. Hiess, P. Steffens, N. Qureshi, J. Palmstrom, M. Bartkowiak, M. Zolliker, ♦S. Hayami, S. Fang, J. White, and J. Checkelsky,
    "The Nature and Origin of Spin Moiré Superlattices in the Europium Triangle Lattice Material EuAg4Sb2",
    APS Global Physics Summit 2026, Denver, Colorado, United States (3/15-20 2026)

  3. ♦T. Sato and ♦S. Hayami,
    "Theory of magnetic octupoles in crystalline solids",
    APS Global Physics Summit 2026, Denver, Colorado, United States (3/15-20 2026)

  4. ♦R. Oiwa,
    "Quantification of electronic chirality using spinless electric toroidal multipoles",
    "Workshop on theory of cross correlations, multipoles, and computational material design 2025 winter", Gotenba, Shizuoka, Japan (12/22-23 2025)

  5. ♦T. Sato,
    "Theory of magnetic multipoles in crystalline solids",
    "Workshop on theory of cross correlations, multipoles, and computational material design 2025 winter", Gotenba, Shizuoka, Japan (12/22-23 2025)

  6. ♦S. Hayami,
    "Advances in Multipole-Based Analysis of Physical Properties",
    "Workshop on theory of cross correlations, multipoles, and computational material design 2025 winter", Gotenba, Shizuoka, Japan (12/22-23 2025)

  7. ♦T. Sato,
    "Microscopic theory of unconventional magnetic and superconducting states",
    "Workshop on theory of cross correlations, multipoles, and computational material design", Gotenba, Shizuoka, Japan (2/17-18 2025)

  8. ♦S. Hayami,
    "Unconventional electronic orderings and cross correlations based on multipole representation",
    "Workshop on theory of cross correlations, multipoles, and computational material design", Gotenba, Shizuoka, Japan (2/17-18 2025)

  9. ♦K. Okigami and ♦S. Hayami,
    "Exploring topological spin order by using machine learning: A new stabilization mechanism for square skyrmion crystals",
    CT.QMAT24: International Conference on Complexity and Topology in Quantum Matterm, Sapporo, Japan (9/23-27 2024)

  10. R. Oiwa, ♦A. Inda, ♦S. Hayami, and H. Kusunose,
    "Microscopic stability mechanism of the helical structure of Tellurium",
    New Frontiers in Advanced Magnetism 2024, Sapporo, Japan (8/6-9 2024)

  11. ♦A. Inda and ♦S. Hayami,
    "Quantitative evaluation of chirality using the electric toroidal monopole",
    New Frontiers in Advanced Magnetism 2024, Sapporo, Japan (8/6-9 2024)

  12. S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
    "Emergent magnetic monopole lattices in centrosymmetric metals",
    International Conference on Magnetism (ICM2024), Bologna, Italy (6/30-7/5 2024)

  13. ♦K. Okigami and ♦S. Hayami,
    "Exploring topological spin order by using machine learning: A new stabilization mechanism",
    International Conference on Magnetism (ICM2024), Bologna, Italy (6/30-7/5 2024)

  14. H. Yoshimochi, R. Takagi, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, S. Itoh, Y. Tokura, T.-h. Arima, ♦S. Hayami, T. Nakajima, and S. Seki,
    "Multi-step topological phase transitions among meron/antimeron and skyrmion crystals in a centrosymmetric magnet",
    APS March Meeting 2023, S55.00004, Las Vegas, Nevada, United States (3/5-10 2023)

  15. ♦K. Okigami, ♦R. Yambe, and ♦S. Hayami,
    "Engineering a Skyrmion Crystal in Ferromagnetic/Antiferromagnetic Bilayers Based on the Magnetic Frustration Mechanism",
    APS March Meeting 2023, Q55.00002, Las Vegas, Nevada, United States (3/5-10 2023)

  16. ♦A. Kirikoshi and ♦S. Hayami,
    "Microscopic mechanism for intrinsic nonlinear Hall conductivity in noncollinear antiferromagnetic metals",
    APS March Meeting 2023, K55.00006, Las Vegas, Nevada, United States (3/5-10 2023)

  17. K. Kobayashi and ♦S. Hayami,
    "Skyrmion and vortex crystals in the Hubbard model",
    APS March Meeting 2023, K54.00009, Las Vegas, Nevada, United States (3/5-10 2023)

  18. Yuuki Yasui, Christopher Butler, Khanh Nguyen, ♦Satoru Hayami, Takuya Nomoto, Tetsuo Hanaguri, Yukitoshi Motome, Ryotaro Arita, Taka-hisa Arima, Yoshinori Tokura, and Shinichiro Seki,
    "Visualization of Magnetic Structures without Spin Sensitivity in the Skyrmion Magnet GdRu2Si2",
    The 9th International Symposium on Surface Science, 01pC-8, online (11/28-12/1 2021)

  19. Yuuki Yasui, Christopher Butler, Khanh Nguyen, ♦Satoru Hayami, Takuya Nomoto, Tetsuo Hanaguri, Yukitoshi Motome, Ryotaro Arita, Taka-hisa Arima, Yoshinori Tokura, and Shinichiro Seki,
    "Imaging the coupling between itinerant electrons and localised moments in the centrosymmetric skyrmion magnet GdRu2Si2",
    APS March Meeting 2021, B40.00002, online (3/15-19 2021)

  20. ♦M. Yatsushiro and ♦S. Hayami,
    "Theoretical study of odd-parity multipole orders in CeCoSi",
    APS March Meeting 2021, P43.00007, online (3/15-19 2021)

  21. Ying Su, ♦S. Hayami, and Shizeng Lin,
    "Dimension transcendence and anomalous charge transport in magnets with moving multiple-Q spin textures",
    APS March Meeting 2020, B59.00009, Denver, Colorado, United States (3/2-6 2020)

  22. Shun Okumura, ♦Satoru Hayami, Yasuyuki Kato, and Yukitoshi Motome,
    "Magnetic hedgehog lattices in noncentrosymmetric metals",
    APS March Meeting 2020, F41.00002, Denver, Colorado, United States (3/2-6 2020)

  23. Yuuki Yasui, Christopher Butler, Khanh Nguyen, Takuya Nomoto, ♦Satoru Hayami, Tetsuo Hanaguri, Yukitoshi Motome, Ryotaro Arita, Taka-hisa Arima, Yoshinori Tokura, and Shinichiro Seki,
    "Spectroscopic-imaging STM measurement of magnetic skyrmions in a centrosymmetric crystal",
    APS March Meeting 2020, F41.00007, Denver, Colorado, United States (3/2-6 2020)

  24. M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, and H. Seo
    "Organic antiferromagnet as a spin current generator",
    The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/23-28 2019)

  25. S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
    "Numerical study on magnetic hedgehog lattices in noncentrosymmetric metals",
    JSPS Core-to-Core Program International meeting “Core-to-Core Final Meeting in Jaca (2019)", Jaca, Spain (9/2-6 2019)

  26. R. Ozawa, ♦S. Hayami, K. Barros, G. W. Chern, Y. Motome, and C. D. Batista,
    "Vortex Crystals with Chiral Stripes in Itinerant Magnets",
    APS March Meeting 2016, C5.00012, Baltimore, Maryland, United States (3/14-18 2016)

  27. ♦S. Hayami, H. Kusunose, and Y. Motome,
    "Toroidal ordering in metals: band shift, magnetotransport, and magnetoelectric effect",
    APS March Meeting 2014, Y7.00013, Denver, Colorado, United States (3/3-7 2014)

  28. ♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
    "3D Dirac Electrons on a Cubic Lattice with Noncoplanar Multiple-Q Order",
    APS March Meeting 2013, G13.00004, Baltimore, Maryland, United States (3/18-22 2013)

  29. Y. Motome, K. Nakamikawa, ♦S. Hayami, M. Udagawa, and Y. Yamaji,
    "Frustration, competing interactions & partial disorder in Kondo lattice systems",
    The International Conference on Highly Frustrated Magnetism (HFM 2012), T1-3, McMaster University, Hamilton, ON, Canada (6/4-8 2012)

  30. ♦S. Hayami, M. Udagawa, and Y. Motome,
    "Partial disorder in the periodic Anderson model on a triangular lattice",
    APS March Meeting 2012, T16.00006, Boston, Massachusetts, United States (2/27-3/2 2012)

Domestic Conference (Invited Talk)

  1. ♦速水 賢,
    "[in Japanese] 非従来型多極子の外場応答",
    [in Japanese] アシンメトリ量子トピカルミーティング「アシンメトリ量子物質における交差相関の開拓」, Kobe University、Hyogo (12/6-7 2024)

  2. ♦S. Hayami,
    "[in Japanese] 多極子理論を用いた機能性反強磁性体の開拓",
    [in Japanese] 第250回磁気学会研究会「次世代ナノテクノロジーを担う磁性理論・計算の新展開」, Ochanomizu、Tokyo (10/9 2024)

  3. ♦S. Hayami,
    "Altermagnetism and multipoles",
    Japan Physical Society Meeting, 79th Annual Meeting, Symposium, 16pN101-7, Hokkaido University, Sapporo (9/16-19 2024)

  4. ♦S. Hayami,
    "Magnetic toroidal moment under the quasi-kagome structure",
    [In Japanese] アシンメトリ量子トピカルミーティング「擬カゴメ構造を有する物質のアシンメトリ量子物性」, Wohlfahrt Toyama，Toyama (8/29-30 2024)

  5. ♦S. Hayami,
    "Cross correlations induced by multipole degrees of freedom in antiferromagnets",
    [In Japanese] H-Physics II 「対称性と物理現象-その発現と制御」, Kobe University，Hyogo (6/14-15 2024)

  6. ♦S. Hayami,
    "[in Japanese] 反強磁性体による創発スピン軌道物性",
    [in Japanese] 2023年度 第2回スピントロニクス研究会, エクシブ鳥羽, Mie (12/3 2023)

  7. ♦S. Hayami,
    "[in Japanese] 相関電子系に対する多極子表現論の構築と交差相関応答への適用",
    [in Japanese] 第17回シンポジウム「物性科学領域横断研究会」記念講演, 名古屋工業大学、Aichi (11/24-25 2023)

  8. ♦S. Hayami,
    "[in Japanese] 機能性トポロジカル磁性体の理論物質設計",
    [in Japanese] シンポジウム「トポロジカルデバイスの現在と未来」, online (10/2-3 2023)

  9. ♦S. Hayami,
    "[in Japanese] 対称性適合多極子基底を用いた新規物性開拓:スピン分裂・非相反伝導・フェロアキシャル秩序",
    [in Japanese] 金研研究会　強相関物質における創発物性研究の現状と将来展望, Tohoku University, Miyagi (4/22-23 2023)

  10. ♦S. Hayami,
    "Helimagnetism and helical structure",
    Japan Physical Society Meeting, 2023 Spring Meeting, Online Conference　Symposium, 25pC2-3, Online (3/22-25 2023)

  11. ♦S. Hayami
    "Chiral degree of freedom based on microscopic multipoles",
    ISSP workshop "[in Japanese] カイラル物質科学の新展開", ISSP, Chiba (12/22-24 2022)

  12. ♦S. Hayami,
    "Symmetric and antisymmetric spin splittings in the systems without the atomic spin-orbit coupling",
    The 9th Metting「Frontiers of Condensed Matter Physics」, imagine hotel & resort , Hokkaido (2/6-8 2020)

  13. ♦S. Hayami,
    "Microscopic theoretical study on toroidal moment and cross-correlated electronic properties",
    Japan Physical Society Meeting, 74th Annual Meeting, 50012-2, Kyusyu University, Fukuoka (3/14-17 2019)

  14. ♦S. Hayami,
    "Skyrmion crystal phase in frustrated magnetisms",
    Frontiers of spin physics, Kyoto University, Kyoto (10/31-11/2 2018)

  15. ♦S. Hayami,
    "Augmented Multipoles and Cross-Correlated Couplings",
    Japan Physical Society Meeting, 2018 Autumn Meeting　Joint Symposium, 9pB105-2, Doshisha University, Kyoto (9/9-12 2018)

  16. ♦S. Hayami,
    "Material design based on toroidal multipole degrees of freedom",
    J-Physics Topical Meeting, ‘Monodukuri’ Series No. 3 “Forefront of Materials Search”, Tokyo Metropolitan University, Tokyo (8/6-7 2018)

  17. ♦S. Hayami
    "Hybrid multipoles in orbital hybridization",
    Meeting「Multipole responses in noncentrosymmetric systems」, Hokkaido University, Hokkaido (1/23 2018)

  18. ♦S. Hayami
    "Hybrid multipoles in hybridized orbital systems",
    The 7th Metting「Frontiers of Strongly Correlated Electron Systems」, imagine hotel & resort , Hokkaido (12/4-6 2017)

  19. ♦S. Hayami,
    "Skyrmion crystals in magnetic insulators and metals",
    238th Meeting of Enreisou, Hokkaido University, Hokkaido (7/14 2017)

  20. ♦S. Hayami,
    "Magnetic vortex induced by effective spin interactions in the Kondo lattice model",
    J-Physics Topical Meeting, Hirosaki University, Aomori (5/20-21 2017)

  21. ♦S. Hayami
    "Multiple-Q magnetic ordering in localized spin and itinerant electron systems",
    The 6th Metting「Frontiers of Strongly Correlated Electron Systems」, Katsuura Kanko Hotel, Wakayama (12/20-22 2016)

  22. ♦S. Hayami,
    "Peculiar magnetism and electronic states in itinerant electron systems -multiple-Q ordering, Dirac electrons, and magnetic topological insulators-",
    JPS Hokkaido Division, Hokkaido University, Hokkaido (10/28 2014)

Domestic Conference (Oral)

  1. ♦S. Hayami,
    "[in Japanese] 多極子表現論に基づいた理論解析",
    [in Japanese] 学術変革領域研究（A)「アシンメトリ量子」令和7年度 領域全体会議・成果報告会, Nagoya Institute of Technology, Aichi (1/6-8 2026)

    2. ♦S. Hayami,
    "[in Japanese] 多極子理論に基づいた交差相関応答の理解と現状",
    [in Japanese] 学術変革領域研究（A)「アシンメトリ量子」討論会 「アシンメトリ量子物質の機能物性に関する現状の把握と展望」, Hakucho Hotel, Shimane (11/1-3 2025)

  2. ♦S. Ohgata, ♦S. Hayami,
    "[in Japanese] 異方的磁気双極子を用いた反強磁性体における内因性異常ホール効果の解析",
    [in Japanese] CREST「未踏物質探索」領域 若手研究会, Kyoto University, Kyoto (8/21-22 2025)

  3. ♦Y. Ogawa, ♦S. Hayami,
    "[in Japanese] g波交替磁性体における非線形ピエゾ磁気効果",
    [in Japanese] CREST「未踏物質探索」領域 若手研究会, Kyoto University, Kyoto (8/21-22 2025)

  4. ♦S. Hayami,
    "Magnetic toroidal multipoles hidden in antiferromagnets",
    Transformative Research Areas (A) "Asymmetric Quantum Matters" FY2024 Area General Meeting/Public Research Kickoff Meeting, Higashi Hiroshima Arts & Culture Hall Kurara, Hiroshima (5/29-31 2024)

  5. ♦S. Hayami,
    "Representation of electronic order parameters breaking spatial inversion, time-reversal or gauge symmetries",
    FYR05 QLC meeting, The University of Tokyo, ISSP, Chiba (12/26-28 2023)

  6. ♦S. Hayami,
    "[in Japanese] 対称性適合多極子基底を用いたアシンメトリ量子物性の表現",
    Transformative Research Areas (A) "Asymmetric Quantum Matters" Kickoff meeting, Okayama University (6/10-11 2023)

  7. ♦S. Hayami,
    "Ferro-axial moment based on microscopic multipoles",
    Asymmetric Quantum 1st conference, Osaka University (8/9-10 2022)

  8. ♦S. Hayami
    "Electronic nematic phase under the breaking of time-reversal, spatial inversion, and gauge symmetries",
    Quantum Liquid Crystals, 2nd Publicly Offered Research Kickoff meeting, ISSP&online, Tokyo (6/18-19 2022)

  9. ♦M. Yatsushiro,
    "Nonlinear conductive phenomena under magnetic toroidal orderings",
    New material science of current-induced phenonemana, Hokkaido University, Hokkaido (11/26 2021)

  10. ♦S. Hayami,
    "Multipole degrees of freedom and off-diagonal responses",
    J-Physics Annual Meeting FY2019, Kobe University, Hyogo (1/6-8 2020)

  11. ♦S. Hayami,
    "Relation between microscopic multipole degrees of freedom and spin-split band structures",
    J-Physics Mini-Workshop in Sapporo, Hokkaido University, Hokkaido (7/22-23 2019)

  12. ♦M. Yatsushiro, ♦S. Hayami,
    "Odd-parity multipole orderings in a metallic f electron compound CeCoSi",
    J-Physics Mini-Workshop in Sapporo, Hokkaido University, Hokkaido (7/22-23 2019)

  13. ♦S. Hayami,
    "Augmented multipoles by bond degree of freedom –example of electric toroidal quadrupole ordering in Cd2Re2O7–",
    J-Physics Topical Meeting “Progress and Future Prospects of Research on Augmented Multipoles and Related Phenomena”, Meiji University, Tokyo (1/21-22 2019)

  14. ♦S. Hayami,
    "Augmented Multipoles and Cross-Correlated Couplings",
    J-Physics Topical Meeting “Progress and Future Prospects of Research on Augmented Multipoles and Related Phenomena”, Meiji University, Tokyo (1/21-22 2019)

  15. ♦S. Hayami,
    "Electric toroidal multipoles and cross-correlated couplings",
    1st ETQ meeting「Multipole orderings and superconductivity」, Hokkaido University, Hokkaido (8/8-9 2018)

  16. ♦S. Hayami,
    "Cross-correlated Couplings by Toroidal Multipoles through Local Orbital Hybridizations",
    J-Physics Annual Meeting FY2018, Tohoku University, Miyagi (5/24-26 2018)

  17. Y. Motome, T. Misawa, J. Yoshitake, and ♦S. Hayami,
    "Charge ordering instability in Kondo lattice systems",
    "Emergence of Heavy Electrons and Their Ordering" 4th workshop, 12D5, Tokyo Institute of Technology, Tokyo, (1/12-14 2013)

  18. ♦S. Hayami,
    "Partial disordered state in the periodic Anderson model on a triangular lattice",
    8th 2012 G-COE RA Meeting, Yuzawa hotel, Niigata, (7 2012)

JPS Meeting (Oral)

    • Japan Physical Society Meeting, 2026 Spring Meeting, Online Conference (3/23-26 2026)

      • ♦Y. Ogawa, ♦S. Hayami,
        "Multipoles and Spin-Orbit Coupling in Collinear Spin Point Groups"(23aC1-1)
      • ♦S. Ohgata, ♦S. Hayami,
        "Large Anomalous Hall Effect in Topologically Trivial Double-Q Magnets"(26aC1-8)
      • ♦A. Inda, ♦S. Hayami,
        "Enantioselective adsorption with ferromagnetic substrate under an AC electric field"(25pG1-4)
      • ♦S. Kuniyoshi, ♦R. Oiwa, ♦S. Hayami,
        "Classification of Atomic Augmented-Multipoles in Many-Body Systems"(26aH2-3)
      • ♦T. Yamanaka, ♦T. Sato, ♦S. Hayami,
        "The relationship between relativistic polarization driven by the magnetic field gradient and the magnetic toroidal monopole"(26aH2-4)
      • ♦S. Kanda，♦S. Hayami,
        "Analysis of magnetoelectric effect in collinear antiferromagnetic zigzag chain"(26aH2-5)
      • ♦Y. Xie, ♦R. Oiwa, ♦S. Hayami,
        "Generation of effective models of phonon system by using symmetry-adapted multipole basis"(23pK1-10)
      • ♦R. J. Laxamana and ♦S. Hayami,
        "Mechanism of Light-Induced Skyrmion Generation in a Frustrated J1-J3 Triangular Lattice"(24pC1-2)
      • ♦C. Guan, ♦Y. Zha, and ♦S. Hayami,
        "Mean-field Analysis of Square Skyrmion Lattice in Noncentrosymmetric 4f-Electron Single-Orbital Systems"(24pPSH-18)

    • Japan Physical Society Meeting, 80th Annual Meeting, Hiroshima University, Hiroshima (9/16-19 2025)

      • ♦Y. Takasu, ♦S. Hayami,
        "Understanding of Magnetic Octupole Current based on Multipole Representation Theory"(16pSK314-4)
      • ♦Y. Ogawa, ♦S. Hayami,
        "Classification of Multipoles Based on Collinear Spin-Point-Group Symmetry and Activation of Physical Responses by Spin-Orbit Coupling"(16pSK314-5)
      • ♦S. Sukawa, ♦S. Hayami,
        "Non-reciprocal Phonon Bands in a Quazi-1D Zigzag Chain"(16pPS-53)
      • R. Nakano, R. Yamada, J. Bouaziz, M. Colling, M. Gen, K. Shoriki, Y. Okamura, A. Kikkawa, H. Ohsumi, Y. Tanaka, H. Sagayama, H. Nakao, Y. Taguchi, Y. Takahashi, M. Tokunaga, T.-h Arima, Y. Tokura, R. Arita, J. Masell, ♦S. Hayami, M. Hirschberger,
        "Perfectly harmonic spin cycloid and multi-Q order in the polar Weyl helimagnet GdAlSi"(17aSK312-9)
      • ♦T. Shirato, ♦R. Yambe, ♦S. Hayami,
        "Topological phase transitions by time-dependent electromagnetic fields in frustrated magnets: Role of dynamical and static magnetic fields"(17pSK313-9)
      • ♦K. Okigami, ♦S. Hayami,
        "Origin of Thermal Stabilization in Skirmion Crystals: A Momentum-Space Spin Model Approach"(18aSK313-3)
      • M. Noda, H. Yoshimochi, N. D. Khanh, S. Okumura, H. Kono, N. Matsuyama, A. Kitaori, S. Aji, H. Saito, H. Sagayama, S. Ito, ♦S. Hayami, Y. Kato, R. Takagi, Y. Motome, T. Nakajima, S. Seki,
        "Emergent Magnetotransport in a rare-earth magnet Hosting Three-dimensional Topological Spin Textures"(18aSK313-8)
      • ♦S. Kanda, ♦S. Hayami,
        "Analysis of physical properties caused by the form of the “ku-no-ji“-shaped model"(16aPS-33)
      • ♦T. Endo, ♦S. Hayami,
        "Relation between the Electric Toroidal Monopole and the Edelstein Effect in a Chiral Cluster Model"(16aPS-71)
      • ♦A. Inda, K. Hattori, H. Kusunose, ♦S. Hayami,
        "Chirality-dependent anti-parallel spin pair under an electric field"(17aSK204-4)
      • ♦Y. Xie, ♦R. Oiwa, ♦S. Hayami,
        "Quantification based on spinless electric toroidal dipole for ferroaxial material K2Zr(PO4)2"(18aSK110-3)
      • ♦R. Oiwa, S. Aoyagi, N. Kanazawa, ♦S. Hayami,
        "Quantification of electronic chirality in B20 crystals"(18pSK303-10)
      • ♦T. Sato, ♦S. Hayami,
        "Quantum theory of orbital magnetic octupole in periodic crystals"(19aSK303-6)
      • N. D. Khanh, H. Yoshimochi, M. Noda, S. Okumura, H. Kono, N. Matsuyama, A. Kitaori, S. Aji, H. Saito, H. Sagayama, S. Ito, ♦S. Hayami, Y. Kato, R. Takagi, Y. Motome, T. Nakajima, S. Seki,
        "Resonant X-ray Scattering study of three-dimensional topological spin-textures in a centrosymmetric cubic magnet"(18aSK313-9)
      • ♦Y. Zha, ♦S. Hayami,
        "Effects of Crystal Field and Momentum-Based Frustrated Interaction on Multiorbital Square Skyrmion Lattice"(19aSK314-7)

    • Japan Physical Society Meeting, 2025 Spring Meeting, Online Conference (3/18-21 2025)

      • ♦T. Shirato, ♦R. Yambe, ♦S. Hayami,
        "Generation of skyrmion crystals by a linearly polarized electric field"(20aC1-8)
      • ♦S. Ohgata, ♦S. Hayami,
        "Intrinsic anomalous Hall effect under anisotropic magnetic dipole versus conventional magnetic dipole"(20pC1-6)
      • ♦K. Uchino, ♦Y. Ogawa, ♦S. Hayami,
        "Analysis of Spin-current Generation by Acoustic Waves in f-wave Altermagnets"(21aC1-8)
      • A. Kirikoshi, ♦S. Hayami,
        "Nonlinear Edelstein effect under a ferroaxial order"(18pH2-10)
      • ♦T. Yamanaka, Y. Ihara, ♦S. Hayami,
        "Nonlinear nonreciprocal electronic conductivity driven by magnetic field gradients"(18pH2-12)
      • ♦T. Sato，♦S. Hayami,
        "Quantum theory of anisotropic magnetic dipole in periodic crystals"(18pH2-13)
      • ♦Y. Zha and ♦S. Hayami,
        "Mean-field Analysis of a Square Skyrmion Lattice in Multi-Orbital f-Electron Systems"(18pH2-8)

    • Japan Physical Society Meeting, 79th Annual Meeting, Hokkaido University, Sapporo (9/16-19 2024)

      • ♦Y. Ogawa, ♦S. Hayami,
        "Piezomagnetic Effects in Altermagnets with Higher-Order Spin-Split Bands"(17aN102-9)
      • ♦K. Okigami, ♦S. Hayami,
        "Machine learning model construction based on the momentum-space spin model"(18aS101-8)
      • ♦S. Kanda, ♦S. Hayami,
        "Nonlinear frequency-asymmetric optical response arising from chiral antisymmetric spin-orbit interaction"(18pN102-9)
      • ♦T. Sato, ♦S. Hayami, S. Kobayashi, Y. Asano,
        "Finite center of mass momentum pairing order in multiband　superconductors"(19aE303-1)
      • ♦S. Hayami,
        "Altermagnetism and multipoles"(16pN101-7)
      • ♦A. Kirikoshi, ♦S. Hayami,
        "Magnetoelectric effect under finite-q magnetic toroidal order: Application to magnetic toroidal metal HoAgGe"(17pE306-14)
      • M. Gen, Y. Fujishiro, ♦K. Okigami, ♦S. Hayami, M. T. Birch, K. Adachi, D. Hashizume, T. Kurumaji, H. Sagayama, H. Nakao, Y. Tokura, T. Arima,
        "Study of the magnetic structure of the axion insulator candidate EuIn_2_As_2_ using resonant X-ray scattering"(18aE306-6)
      • M. Noda，N. D. Khanh，H. Sagayama，H. Yoshimochi，R. Takagi，H. Takeya，A. Kitaori，T. Nakajima，♦S. Hayami，S. Seki,
        "Discovery of antiferromagnetic meron crystal in a centrosymmetric rare-earth magnet GdNi2B2C"(18pE306-16)
      • R. Oiwa, ♦A. Inda, ♦S. Hayami, H. Kusunose,
        "Microscopic stability mechanism of the helical structure of Tellurium"(18pE307-14)
      • ♦A. Inda, ♦S. Hayami,
        "Microscopic origin of ferroaxial ordering induced by rotational distortion"(19aE306-5)

    • Japan Physical Society Meeting, 2024 Spring Meeting, Online Conference (3/18-21 2024)

      • ♦A. Kirikoshi, ♦S. Hayami,
        "Nonlinear Magnetostriction under Ferroaxial Ordering"(20pH2-8)
      • ♦K. Okigami, ♦S. Hayami,
        "Exploring topological spin order by using machine learning: A new stabilization mechanism for square skyrmion crystals"(20pC1-3)
      • ♦A. Inda, R. Oiwa, H. Kusunose, H. Yamamoto, ♦S. Hayami,
        "Analysis of chiralized methane molecule using electric toroidal monopole"(19aG1-9)
      • R. Oiwa, ♦A. Inda, ♦S. Hayami, T. Nomoto, R. Arita, H. Kusunose,
        "Construction of symmetry-adapted Closest Wannier models using multipole basis"(18pL3-8)
      • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
        "Versatile magnetic hedgehog lattice phases and spin scalar chirality induced by anisotropic interactions in centrosymmetric systems"(18pC1-8)
      • ♦R. Yambe，♦S. Hayami,
        "Stabilization of skyrmion crystals and control of topology by circularly polarized electric field"(18pC1-6)
      • Y. Dong, Y. Kinohsita, 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, T. Kondo,
        "Magnetic-domain-dependent pseudogap induced by Fermi surface nesting in GdRu2Si2"(18pE2-5)
      • ♦S. Kanda, ♦S. Hayami,
        "Nonlinear optical response characteristics of chiral crystal structures"(20pPSD-2)

    • Japan Physical Society Meeting, 78th Annual Meeting, Tohoku University, Miyagi (9/16-19 2023)

      • N. Matsuyama, T. Nomura, ♦S. Hayami, Y. Kato, H. Yoshimochi, N. D. Khanh, R. Takagi, Y. Tokura, S. Seki, Y. Kohama,
        "Report on Novel Magnetic Phases and Investigation of the Magnetism in Centrosymmetric Skyrmion-host GdRu2(Si, Ge)2"(17pA401-4)
      • H. Yoshimochi, R. Takagi, N. D. Khanh, ♦S. Hayami, S. Seki,
        "Angular dependence of magnetic phase diagram in a centrosymmetric tetragonal skyrmion-hosting magnet GdRu2Ge2"(17pA401-3)
      • S. Tsutsui, H. Hanate, T. Honda, ♦S. Hayami, N. Nagasawa, Y. Yoda, K. Matsuhira,
        "Mossbauer spectroscopy and neutron diffraction of Ca5Ir3O12"(17aA404-7)
      • ♦A. Inda, ♦S. Hayami,
        "Magnetic instability under electric toroidal dipole ordering"(17aA401-2)
      • ♦A. Kirikoshi, ♦S. Hayami,
        "Classification of Superconducting Gap Symmetry by Multipole Basis"(16aA401-13)
      • ♦R. Yambe, ♦S. Hayami,
        "Noncoplanr spin textures stabilized by laser-induced magnetic interactions"(18aC200-4)
      • N. Tomoda, Y. Fujisawa, ♦S. Hayami, B. R. M. Smith, T. Nakamura, Y. Okada,
        "Imaging a new CDW order in the antiferromagnetic phase of TbTe3"(16aB102-6)

    • Japan Physical Society Meeting, 2023 Spring Meeting, Online Conference (3/22-25 2023)

      • ♦S. Hayami,
        "Helimagnetism and helical structure"(25pC2-3)
      • ♦R. Yambe，♦S. Hayami,
        "Symmetry analysis of laser-induced magnetic anisotropy"(25aC2-6)
      • ♦A. Inda，♦S. Hayami,
        "Nonlinear transverse magnetic susceptibility under electric toroidal dipole ordering"(23aH3-4)
      • Y. Ichino，T. Miyamoto，R. Kojiyama，S. Hosoi，M. Shimozawa，K. Izawa，♦M. Yatsushiro，♦S. Hayami，Y. Onuki，D. Aoki,
        "Nonlinear transverse conductivity under magnetic field in the ferri-/antiferro-magnetic toroidal candidate metal HoAgGe"(22pH2-1)
      • R. Takagi，H. Kono，H. Saito，J. S. White，V. Ukleev，♦S. Hayami，T. Nakajima，S. Seki,
        "Control of magnetic anisotropy and stability of magnetic skyrmion state in a centrosymmetric itinerant magnet EuAl4"(22aH1-1)

    • Japan Physical Society Meeting, 2022 Autumn Meeting, Tokyo Institute of Technology, Tokyo (9/12-15 2022)

      • T. Miyamoto, S. Takao, K. Ota, R. Kojiyama, S. Hosoi, M. Shimozawa, K. Izawa, M. Yatsushiro, ♦S. Hayami, Y. Onuki, D. Aoki,
        "Nonlinear transverse conductivity in the new toroidal metal HoAgGe"(15aW331-6)
      • H. Yoshimochi, R. Takagi, J. Ju, ♦S. Hayami, N. D. Khanh, S. Aji, H. Saito, D. Singh, P. Baral, L. Spitz, V. Ukleev, J. S. White, S. Francoual, J. R. L. Mardegan, H. Sagayama, H. Nakao, T. Arima, Y. Tokura, T. Nakajima, S. Seki,
        "Unveiling the whole picture of the magnetic phase diagram in a centrosymmetric tetragonal multiple-skyrmion-phase-hosting magnet GdRu2(Si1-xGex)2"(14pW631-10)
      • K. Kobayashi, ♦S. Hayami,
        "Skyrmions and merons in the Hubbard model"(14pW631-5)
      • ♦A. Kirikoshi, ♦S. Hayami,
        "Intrinsic Nonlinear Hall Effect in PT-symmetric Noncollinear Antiferromagnetic Metal"(13aW331-11)

    • Japan Physical Society Meeting, 77th Annual Meeting, Online Conference (3/15-19 2022)

      • ♦M. Yatsushiro, ♦S. Hayami,
        "Mean-field study of multipole orderings in CeCoSi"(15aGB32-3)
      • ♦K. Okigami, ♦R. Yambe, ♦S. Hayami,
        "Skyrmion crystals in ferromagnetic-antiferromagnetic bilayer systems"(15pT31-10)
      • ♦R. Yambe, ♦S. Hayami,
        "Emergence of antiferro- and ferri-chiral skyrmion crystals in itinerant magnets on the honeycomb lattice"(16aGB41-1)
      • ♦S. Hayami, T. Okubo, Y. Motome,
        "Phase shift in skyrmion crystals"(17aT31-12)

    • Japan Physical Society Meeting, 2021 Autumn Meeting, Online Conference (9/20-23 2021)

      • ♦R. Yambe, ♦S. Hayami,
        "Classification of magnetic anisotropy with wave number dependence based on group theory and application to the skyrmion crystals in itinerant magnets"(20aC1-3)
      • J. Nasu, ♦S. Hayami,
        "Antisymmetric thermopolarization by electric toroidal multipoles"(20pH1-12)
      • ♦T. Matsumoto, ♦S. Hayami,
        "Neel and Bloch skyrmion crystals induced by bond-dependent anisotropic exchange interactions in triangular frustrated magnets"(21aC1-7)
      • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
        "Magnetic field dependence of the helical plane and ellipticity in multiple-Q magnetic textures in a centrosymmetric system"(21pC1-1)
      • ♦S. Hayami,
        "Multiple skyrmion crystals in frustrated itinerant magnets"(21pC1-4)
      • 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,
        "Multiple-Q spin textures in tetragonal itinerant magnet GdRu2Si2"(21pC1-5)
      • ♦S. Hayami, ♦R. Yambe,
        "Study of short-period skyrmion-hosting material EuPtSi based on an effective spin model"(23pH2-9)

    • Japan Physical Society Meeting, 76th Annual Meeting, Online Conference (3/12-15 2021)

      • ♦R. Yambe, ♦S. Hayami,
        "New mechanism for stabilizing the skyrmion crystals in itinerant magnets due to the magnetic anisotropy"(12pH3-11)
      • Y. Kato, ♦S. Hayami, Y. Motome,
        "Spin-wave excitation in multiple-Q magnetic orderings"(12aC1-5-5)
      • ♦M. Yatsushiro, H. Kusunose, ♦S. Hayami,
        "Classification of magnetic order by multipoles"(13aH2-6)
      • ♦S. Hayami, H. Kusunose,
        "Hidden spin-orbit coupling under magnetic quadrupole ordering"(13aH2-7)
      • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
        "Magnetic hedgehog lattices in centrosymmetric metals"(13pC1-10)
      • K. Matsuhira, H. Hanate, K. Nakamura, S. Kawano, M. Hayashida, T. Hasegawa, S. Tsutsui, ♦S. Hayami,
        "Hidden Order at 105K and Current-induced Phenomena in the Geometrically Frustrated Iridate Ca5Ir3O12"(13pH2-1)
      • H. Hanate, S. Kawano, K. Matsuhira, T. Hasegawa, S. Tsutsui, ♦S. Hayami,
        "Inelastic X-ray Scattering Study of the Hidden Order at 105 K in Ca5Ir3O12"(13pH2-3)
      • T. Hasegawa, H. Hanate, S. Kawano, K. Matsuhira, S. Tsutsui, s. Hayami,
        "Order parameter of the phase transition at 105K on Ca5Ir3O12"(13pH2-4)
      • ♦T. Matsumoto, ♦S. Hayami,
        "Nonreciprocal magnons due to cluster toroidal multipoles in noncentrosymmetric magnets"(14aC1-8)

    • Japan Physical Society Meeting, 2020 Autumn Meeting, Online Conference (9/8-11 2020)

      • ♦R. Yambe, ♦S. Hayami,
        "Skyrmion crystal induced by anisotropic spin-charge coupling in itinerant magnets"(8aC1-2)
      • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
        "Field-induced topological transitions in magnetic hedgehog lattices in itinerant magnets"(8aC1-4)
      • ♦M. Yatsushiro, ♦S. Hayami,
        "Nonlinear electric transport in electric and magnetic odd-parity multipoles on a zigzag chain"(8aC1-9)
      • Y. Yasui, C. J. Butler, N. D. Khanh, ♦S. Hayami, T. Nomoto, T. Hanaguri, Y. Motome, R. Arita, T.-h. Arima, Y. Tokura, S. Seki,
        "Relation between electronic-state modulations and magnetic structures in the magnetic skyrmion compound GdRu2Si2"(8pC1-8)
      • H. Yasuda, Y. Kato, ♦S. Hayami, Y. Motome,
        "First-principles analysis of spin-orbital coupled phenomena in a pyrochlore oxide Cd2Re2O7"(8pH2-2)
      • ♦M. Yatsushiro, ♦S. Hayami,
        "Theoretical study on NMR spectrum in the odd-parity multipole orderings in CeCoSi"(9aH3-1)

    • Japan Physical Society Meeting, 75th Annual Meeting, Nagoya University, Aichi (3/16-19 2020)

      • ♦T. Matsumoto, ♦S. Hayami,
        "Nonreciprocal magnon by symmetric anisotropic exchange interaction in honeycomb antiferromagnet"(16pE22-4)
      • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
        "Numerical study of the field effects on magnetic hedgehog lattices in itinerant magnets"(17pE24-1)
      • H. Yasuda, Y. Kato, ♦S. Hayami, Y. Motome,
        "First-principles calculation for the magneto-current effect in a pyrochlore oxide Cd2Re2O7"(16pB21-2)
      • Khanh Nguyen, Taro Nakajima, ♦Satoru Hayami, Shang Gao, Hironori Nakao, Hajime Sagayama, Yuichi Yamasaki, Yukitoshi Motome, Yoshinori Tokura, Takahisa Arima, Shinichiro Seki,
        "Multiple-Q spin textures in itinerant magnet GdRu2Si2"(17aB22-11)
      • ♦S. Hayami, Y. Yanagi, H. Kusunose,
        "Understanding of spin-split band structures based on multipole degrees of freedom in crystals"(19aD15-8)
      • ♦M. Yatsushiro, Y. Yanagi, ♦S. Hayami,
        "Nonreciprocal electric current under magnetic toroidal ordering on a zigzag chain"(19aD15-9)
      • ♦R. Yambe, ♦S. Hayami,
        "Derivation of the anisotropic Kondo coupling starting from the periodic Anderson model with the anisotropic c-f hybridization"(19aD15-12)

      • Japan Physical Society Meeting, 2019 Autumn Meeting, Gifu University, Gifu (9/10-13 2019)

        • S. Okumura, ♦S. Hayami, Y. Kato, Y. Motome,
          "Numerical study on multiple-Q magnetic hedgehog lattices in 3D itinerant electron systems"(12pB14-6),
        • M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, H. Seo,
          "Anomalous Hall effect in κ-type molecular conductors"(11aK23-7)

      • Japan Physical Society Meeting, 74th Annual Meeting, Kyusyu University, Fukuoka (3/14-17 2019)

        • ♦M. Yatsushiro, ♦S. Hayami,
          "Theoretical study of odd-parity multipole orderings in CeCoSi"(15pS301-10)
        • ♦T. Matsumoto, ♦S. Hayami,
          "Skyrmion crystal phases in frustrated magnets with anisotropic exchange interactions"(15pF304-6)
        • M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, H. Seo,
          "Symmetry breaking and transport properties in κ-type molecular conductors"(15aB211-4)
        • ♦R. Yambe, ♦S. Hayami,
          "Multiple-Q ordering in d-p model with strong Hund’s rule coupling"(14pS301-9)

      • Japan Physical Society Meeting, 2018 Autumn Meeting, Doshisha University, Kyoto (9/9-12 2018)

        • ♦S. Hayami, ♦M. Yatsushiro, Y. Yanagi, H. Kusunose,
          "Classification of atomic-scale multipoles under crystallographic point groups"(10pB203-10)
        • ♦S. Hayami, Y. Yanagi, H. Kusunose, Y. Motome,
          "Possibility of electric toroidal quadrupole ordering in Cd2Re2O7"(9aB206-7)
        • M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, H. Seo
          "Spin current generation in κ-type molecular conductors"(11pK302-7)
        • M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, H. Seo
          "Spin splitting in κ-type molecular conductors"(11pK302-6)
        • Y. Yanagi, ♦S. Hayami, Y. Motome, H. Kusunose,
          "Multipole ordering and nonreciprocal response in Cd2Re2O7"(9aB206-8)

      • Japan Physical Society Meeting, 73rd Annual Meeting, Tokyo University of Science, Chiba (3/22-25 2018)

        • , H. Kusunose, and Y. Motome,
          "Odd-parity multipoles and magnetoelectric effects in 5d transition metal oxides AOsO4(A=K, Rb, Cs)"(25aK304-9)

      • Japan Physical Society Meeting, 2017 Autumn Meeting, Iwate University, Iwate (9/21-24 2017)

        • ♦S. Hayami and Y. Motome,
          "Multiple-Q magnetic orderings in the Kondo lattice model with the spin-orbit coupling"(23aE20-7)
        • ♦S. Hayami and Y. Motome,
          "Effect of magnetic anisotropy on skyrmion crystal in the Kondo lattice model"(23aE20-6)
        • ♦S. Hayami, H. Kusunose,
          "Toroidal multipoles in local parity mixing systems"(22aF11-11)
        • Y. Yanagi,, ♦S. Hayami, H. Kusunose,
          "Theory of magnetoelectric response in honeycomb antiferromagnet Co4Nb2O9"(22aF11-12)

      • Japan Physical Society Meeting, 71st Annual Meeting, Osaka University,　Osaka (3/17-20 2017)

        • ♦S. Hayami, R. Ozawa, Y. Motome,
          "Skyrmion crystal phase induced by effective spin-spin interactions in the Kondo lattice model"(19pC24-8)
        • Y. Yanagi,, ♦S. Hayami, H. Kusunose,
          "Theoretical study on magnetoelectric effect in Co4Nb2O9"(20aL22-4)
        • R. Ozawa, ♦S. Hayami, Y. Motome,
          "Temperature-field phase diagram of skyrmion crystals with different topological numbers in the Kondo lattice model"(19pC24-9)

      • Japan Physical Society Meeting, 2016 Autumn Meeting, Kanazawa University, Ishikawa (9/13-16 2016)

        • ♦S. Hayami, H. Kusunose, and Y. Motome,
          "Emergent spin-valley-orbital physics by spontaneous parity breaking"(14pKE-3),
        • ♦S. Hayami, S.-Z. Lin, and C. D. Batista,
          "Bubble and skyrmion crystals in frustrated magnets with easy-axis anisotropy"(13aAA-3)
        • ♦S. Hayami, S.-Z. Lin, and C. D. Batista,
          "Magnetic Vortex Induced by Nonmagnetic Impurity in Frustrated Magnets"(13aAA-2)
        • R. Ozawa, ♦S. Hayami, and Y. Motome,
          "Domain structure of multiple-Q ordered states in itinerant magnets"(13pAP-7)
        • R. Ozawa, Kipton Barros, ♦S. Hayami, and Y. Motome,
          "Collinear, coplanar, and noncoplanar magnetic transitions induced by the magnetic anisotropy and external magnetic field in spin-charge coupled systems"(13pAP-5),

      • Japan Physical Society Meeting, 2015 Autumn Meeting, Kansai University, Osaka (9/16-19 2015)

        • ♦Satoru Hayami, Ryo Ozawa, Yukitoshi Motome, Cristian D. Batista,
          "Stabilizing Mechanism of Meron Crystals: Weak Coupling Approach"(16aDC-2)
        • Ryo Ozawa, Kipton Barros, ♦Satoru Hayami, Gia-Wei Chern, Masafumi Udagawa, Yukitoshi Motome, Cristian D. Batista,
          "Numerical Study on Meron Crystals with Spin Scalar Chiral Stripes on a Square Lattice"(16aDC-1)

      • Japan Physical Society Meeting, 70st Annual Meeting, Waseda University, Tokyo (3/21-24 2015)

        • ♦S. Hayami, H. Kusunose, and Y. Motome,
          "Collective excitations in toroidal ordered systems"(23pBF-13)
        • Y. Sugita, ♦S. Hayami, and Y. Motome,
          "Orbital order and anomalous electronic state in a d-p model with parity mixing"(23pBF-12)

      • Japan Physical Society Meeting, 2014 Autumn Meeting, Chubu University, Aichi (9/7-10 2014)

        • ♦S. Hayami, H. Kusunose, and Y. Motome,
          "Magnetic ordering in an extended Kondo lattice model with local parity mixing"(9aBG-6)
        • ♦S. Hayami, H. Kusunose, and Y. Motome,
          "Spontaneous parity breaking in spin-orbital coupled systems"(9aBG-5)
        • ♦S. Hayami and Y. Motome,
          "A stabilization mechanism of noncollinear and noncoplanar magnetic ordering in itinerant electron systems"(9aBG-4)

      • Japan Physical Society Meeting, 69st Annual Meeting, Tokai University, Kanagawa (3/27-30 2014)

        • ♦S. Hayami, H. Kusunose, and Y. Motome,
          "Torodial ordering in metals: band shift, magnetotransport, and magnetoelectric effect"(29pAY-2)

      • Japan Physical Society Meeting, 2013 Autumn Meeting, Tokushima University, Tokushima (9/25-28 2013)

        • ♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
          "Monte Carlo analysis of multiple-Q magnetic ordering in the classical Kondo lattice model on a cubic lattice"(27pKF-5)

      • Japan Physical Society Meeting, 68st Annual Meeting, Hiroshima University, Hiroshima (3/26-29 2013)

        • ♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
          "Noncoplanar multiple-Q magnetic ordering with three-dimensional Dirac electrons on a cubic lattice"(26aXJ-11)

      • Japan Physical Society Meeting, 2012 Autumn Meeting, Yokohama National University, Kanagawa (9/18-21 2012)

        • ♦S. Hayami, M. Udagawa, and Y. Motome,
          "Partial disordered state induced by magnetic field and spin anisotropy in the periodic Anderson model on a triangular lattice"(20pGB-10)
        • ♦S. Hayami, T. Misawa, and Y. Motome,
          "Multiple-Q magnetic orderng and charge ordering in the periodic Anderson model"(21aFG-12)

      • Japan Physical Society Meeting, 67st Annual Meeting, Kwansei Gakuin University, Hyogo (3/24-27 2012)

        • ♦S. Hayami, M. Udagawa, and Y. Motome,
          "Partial disordered state near commesulate fillings in the periodic Anderson model on a triangular lattice"(26pYB-7)

      • Japan Physical Society Meeting, 2011 Autumn Meeting, Toyama University, Toyama (9/21-24 2011)

        • ♦S. Hayami, M. Udagawa, and Y. Motome,
          "Partial disordered state in the frustrated periodic Anderson model"(22pGB-8),

      • Japan Physical Society Meeting, 66st Annual Meeting, Niigata University, Niigata (3 2011 [the meeting is cancelled by earthquake])

        • ♦S. Hayami, M. Udagawa, and Y. Motome,
          "Partial Kondo Screening in the frustrated periodic Anderson model"(26aEF-8)

セミナー

  1. [Formal] ♦Satoru Hayami,
    "Altermagnetism and its extension based on multipoles",
    Seminar at Osaka University, Osaka University, Osaka (7/28 2025)

  2. [Informal] ♦Satoru Hayami,
    "Cross-correlation phenomena in antiferromagnets based on multipole representation",
    Seminar at Rutgers University, New Jersey, United States (1/7 2025)

  3. [Formal] ♦Satoru Hayami,
    "Emergent spin-orbit physics in spin-orbit-coupling free antiferromagnets based on multipole representations",
    KUJI QMAT Seminar, online (2/15 2024)

  4. [Formal] ♦Satoru Hayami,
    "Stabilization of triangular and square skyrmion crystals in centrosymmetric lattice systems",
    Special BLABS seminar at Los Alamos National Labratory, online (4/19 2022)

  5. [Formal] ♦Satoru Hayami,
    "Engineering nonreciprocal magnon excitations based on magnetic toroidal moment",
    StatPhys Seminar@U Tokyo, online (10/11 2021)

  6. [Informal] ♦Satoru Hayami,
    "Topological spin crystals by localized/itinerant frustration",
    PREST 4th informal meeting 「Topological defect in real space」, online (3/30 2021)

  7. [Formal] ♦Satoru Hayami,
    "Classification of multipoles and cross-correlated phenomena under crytsallographic point group",
    ISSP Qunatum material seminar, University of Tokyo, Chiba (12/28 2018)

  8. [Informal] ♦Satoru Hayami,
    "Chiral orderings in frustrated magnets",
    Motome Lab seminar, University of Tokyo, Tokyo (3/24 2016)

  9. [Formal] ♦Satoru Hayami,
    "Noncoplanar ordering in frustrated itinerant magnets",
    BLABS, Los Alamos National Laboratory, Los Alamos, New Mexico, United States (11/2 2015)

  10. [Informal] ♦Satoru Hayami,
    "Spontaneous Inversion Symmetry Breaking in Itinerant Electron Systems",
    Los Alamos National Laboratory, Los Alamos, New Mexico, United States (4/13 2015)

  11. [Formal] ♦S. Hayami,
    "Effects of electron correlation in spin-orbital coupled systems -parity breaking by charge, spin, and orbital ordering and peculiar responses-",
    Colloquium in Condensed Matter Physics, Niigata University, Niigata (11/12 2014)

  12. [Formal] ♦Satoru Hayami,
    "Toroidal order in metals without local inversion symmetry",
    ETH, Zurich, Switzerland (7/14 2014)

  13. [Informal] ♦Satoru Hayami,
    "3D Dirac electrons on a cubic lattice with noncoplanar multiple-Q order",
    Goethe University, Frankfurt, Germany (7/3 2014)

  14. [Formal] ♦Satoru Hayami,
    "3D Dirac electrons on a cubic lattice with noncoplanar multiple-Q order",
    Max-Planck Institute, Stuttgart, Germany (7/1 2014)

  15. [Informal] ♦Satoru Hayami,
    "Toroidal order in metals without local inversion symmetry",
    University of Cologne, Cologne, Germany (6/25 2014)

  16. [Informal] ♦S. Hayami,
    "Noncoplanar multiple-Q magnetic orderings in itinerant electron systems",
    Furusaki Lab seminar, RIKEN, Wako, Saitama (4/25 2014)

  17. [Informal] ♦S. Hayami,
    "Noncoplanar multiple-Q magnetic orderings with three-dimensional Dirac electrons",
    Kohno Lab seminar, Osaka University, Toyonaka, Osaka (7/5 2013)