International Conference (Poster)

♦S. Kanda and ♦S. Hayami,
"Nonlinear optical responses and their frequency dependence under chiral crystal structure",
New Frontiers in Advanced Magnetism 2024, Sapporo, Japan (8/69 2024)

♦A. Kirikoshi and ♦S. Hayami,
"Magnetoelectric effect in magnetic toroidal metal HoAgGe",
New Frontiers in Advanced Magnetism 2024, Sapporo, Japan (8/69 2024)

♦A. Kirikoshi and ♦S. Hayami,
"Magnetoelectric effect in magnetic toroidal metal HoAgGe",
META 2024, Toyama, Japan (7/1619 2024) 
♦A. Inda, R. Oiwa, ♦S. Hayami, H. Yamamoto, and H. Kusunose,
"Quantification of chirality based on electric toroidal monopole: Application to a twisted methane molecule",
META 2024, Toyama, Japan (7/1619 2024) 
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,
"Multistep topological transitions among meron and skyrmion crystals in a centrosymmetric magnet",
International Conference on Magnetism (ICM2024), Bologna, Italy (6/307/5 2024)

♦A. Inda, H. Kusunose, H. Yamamoto, and ♦S. Hayami,
"Quantification of chirality based on electric toroidal monopole",
MRM 2023, Kyoto, Japan (12/1116 2023) 
♦R. Yambe and ♦S. Hayami,
"Symmetry analysis of lightinduced magnetic interactions via Floquet engineering",
Trends in MAGnetism 2023, Rome, Italy (9/48 2023) 
♦K. Okigami, ♦R. Yambe, and ♦S. Hayami,
"Engineering a Skyrmion Crystal in Ferromagnetic/Antiferromagnetic Bilayers Based on Magnetic Frustration Mechanism",
Topological Matter School 2023, DonostiaSan Sebastián, Spain (8/2025 2023) 
♦A. Kirikoshi and ♦S. Hayami,
"Classification of Superconductivity in Multiorbital Systems by Multipoles",
International Conference on Quantum Liquid Crystals 2023, Hokkaido University, Hokkaido, Japan (8/810 2023)

♦A. Inda and ♦S. Hayami,
"Thirdorder transverse magnetic susceptibility under ferroaxial ordering",
International Conference on Quantum Liquid Crystals 2023, Hokkaido University, Hokkaido, Japan (8/810 2023)

♦R. Yambe and ♦S. Hayami,
"Floquet engineering of magnetic interactions: Understanding based on the crystal symmetry lowering",
International Conference on Quantum Liquid Crystals 2023, Hokkaido University, Hokkaido, Japan (8/810 2023)

♦R. Yambe and ♦S. Hayami,
"Sublatticedependent Skyrmion Crystals by Itinerant Frustration",
International Conference on Strongly Correlated Electron Systems 2023, Songdo ConvensiA, Incheon, Korea (7/27 2023)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Magnetic Hedgehog Lattices in Itinerant Magnets",
International Conference on Strongly Correlated Electron Systems 2023, Songdo ConvensiA, Incheon, Korea (7/27 2023)

K. D. Nguyen, T. Nakajima, S. Hayami, S. Gao, Y. Yamasaki, H. Sagayama, H. Nakao, R. Takagi, Y. Motome, Y. Tokura, T.h. Arima, S. Seki,
"Zoology of multipleQ spin textures in centrosymmetric tetragonal magnet GdRu2Si2",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"QuadrupleQ Hedgehog Lattices in Itinerant Magnets",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

Y. Kato, ♦S. Hayami, and Y. Motome,
"Magnetic FieldTemperature Phase Diagrams and Spin Excitation Spectra for Topological MultipleQ Magnetic Orders",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

♦S. Hayami,
"Skyrmion Crystals in Centrosymmetric MultiLayer Systems",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

H. Yoshimochi, R. Takagi, ♦S. Hayami, J. Ju, N. D. Khanh, H. Saito, H. Sagayama, H. Nakao, T.h. Arima, Y. Tokura, T. Nakajima, S. Seki,
"Multiplestep topological phase transitions in a centrosymmetric tetragonal magnet GdRu2Ge2",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

♦K. Okigami, ♦R. Yambe, and ♦S. Hayami,
"Skyrmion crystal in a centrosymmetric bilayered system consisting of ferromagnetic and antiferromagnetic layers",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

♦R. Yambe and ♦S. Hayami,
"Constructing effective anisotropic spin models for multipleQ states by symmetry argument and microscopic analysis",
29th International Conference on Low Temperature Physics, Sapporo Convention Center, Hokkaido, Japan (8/1824 2022)

Y. Kato, ♦S. Hayami, and Y. Motome,
"Magnetic fieldtemperature phase diagrams and spin excitation spectra for topological multiple𝑸 magnetic orders",
International Conference on Strongly Correlated Electron Systems 2022 (SCES2022), Amsterdam, The Netherlands (7/2429 2022)

♦K. Okigami, ♦R. Yambe, and ♦S. Hayami,
"Engineering skyrmion crystal in centrosymmetric ferromagnetic/antiferromagnetic bilayers",
International Conference on Strongly Correlated Electron Systems 2022 (SCES2022), Amsterdam, The Netherlands (7/2429 2022)

♦R. Yambe and ♦S. Hayami,
"Classification of anisotropic exchange interactions in momentum space toward understanding multipleQ instability",
International Conference on Strongly Correlated Electron Systems 2022 (SCES2022), Amsterdam, The Netherlands (7/2429 2022)

Y. Kato, ♦S. Hayami, and Y. Motome,
"Magnetic fieldtemperature phase diagrams and spin excitation spectra for multipleQ magnetic orders",
11th International Conference on Highly Frustrated Magnetism 2022 (HFM2022), O15, Paris, France (6/2024 2022)

♦R. Yambe and ♦S. Hayami,
"Effective anisotropic spin model in momentum space: Application to search for multipleQ orderings,
11th International Conference on Highly Frustrated Magnetism 2022 (HFM2022), T31, Paris, France (6/2024 2022)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"QuadrupleQ magnetic hedgehog lattices in itinerant magnets",
11th International Conference on Highly Frustrated Magnetism 2022 (HFM2022), T30, Paris, France (6/2024 2022)

♦R. Yambe and ♦S. Hayami,
"Skyrmion crystals in itinerant trigonal magnets",
International Conference on Frustration, Topology, and Spin Textures, P8, online (12/2223 2021)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"QuadrupleQ Hedgehog Lattice in a Centrosymmetric Metal",
International Conference on Frustration, Topology, and Spin Textures, P15, online (12/2223 2021)

H. Hanate, S. Kawano, T. Hasegawa, S. Tsutsui, ♦S. Hayami, and K. Matsuhira,
"Inelastic Xray Scattering Study of the Hidden Order at 105 K in Ca5Ir3O12",
The International Conference on SCES 2020, online (9/2710/1 2021)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Magnetic Hedgehog Lattice in a Centrosymmetric Cubic Metal",
DMI2021 "VI International Workshop DzyaloshinskiiMoriya Interaction and Exotic Spin Structures", online (9/610 2021)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Hedgehog Lattice in a Centrosymmetric Cubic Metal",
International Conference on Quantum Liquid Crystals 2021, online, Japan (5/1113 2021)

M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, and H. Seo,
"Spin current generation in collinear antiferromagnets",
International Conference on Quantum Liquid Crystals 2021, online, Japan (5/1113 2021)

M.T. Suzuki, T. Nomoto, R. Arita, Y. Yanagi, ♦S. Hayami, H. Kusunose, V. T. N. Huyen, K. Yamauchi, and T. Oguchi,
"Multipole expansion for magnetic structures and its application to the study of anomalous Hall effect in antiferromagnets",
The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/2328 2019)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Magnetic Hedgehog Crystals in Noncentrosymmetric Metals",
The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/2328 2019)

♦R. Yambe and ♦S. Hayami,
"Noncoplanar DoubleQ State in dp Model with Strong SpinCharge Coupling",
The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/2328 2019)

♦M. Yatsushiro and ♦S. Hayami,
"OddParity Multipole Order in CeCoSi",
The International Conference on SCES 2019, Okayama University, Okayama, Japan (9/2328 2019)

♦T. Matsumoto and ♦S. Hayami,
"Nonreciprocal magnon by symmetric anisotropic exchange interaction on a honeycomb antiferromagnet ",
JPhysics 2019 International Conference & KINKENWAKATE 2019 Multipole Physics, Kobe University, Hyogo, Japan (9/1721 2019)

♦M. Yatsushiro and ♦S. Hayami,
"Crosscorrelation phenomena by oddparity multipoles in CeCoSi",
JPhysics 2019 International Conference & KINKENWAKATE 2019 Multipole Physics, Kobe University, Hyogo, Japan (9/1721 2019)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Numerical study of magnetic hedgehog lattices in itinerant electron systems",
V International Workshop DzyaloshinskiiMoriya Interaction and Exotic Spin Structures, Petrozavodsk, Russia (7/812 2019)

M. Naka, ♦S. Hayami, H. Kusunose, Y. Yanagi, Y. Motome, and H. Seo
"Organic antiferromagnet as a spin current generator",
International Conference on Frontiers of Correlated Electron Sciences, P43, Bunkyoku, Tokyo, Japan (5/2931 2019)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Numerical study of magnetic hedgehog crystals in itinerant chiral magnets",
International Conference on Frontiers of Correlated Electron Sciences, P50, Bunkyoku, Tokyo, Japan (5/2931 2019)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Numerical study of 3Q and 4Q hedgehog crystals in 3Dspincharge coupled systems",
CEMS Symposium on Emergent Quantum Materials, P16, Bunkyoku, Tokyo, Japan (5/2224 2019)

Y. Yanagi, ♦S. Hayami, and H. Kusunose,
"Theoretical study on magnetoelectric response in the honeycomb antiferromagnet Co4Nb2O9",
JPhysics 2017: International Workshop on Multipole Physics and Related Phenomena, P21, Hachimantai, Iwate, Japan (9/2528 2017)

M. Yantsushiro and ♦S. Hayami,
"Magnetic ordering in the dp model with spinorbit couplings on a zigzag chain",
JPhysics 2017: International Workshop on Multipole Physics and Related Phenomena, P46, Hachimantai, Iwate, Japan (9/2528 2017)

Y. Yanagi, ♦S. Hayami, and H. Kusunose,
"Magnetoelectric response in Co4Nb2O9",
The International Conference on SCES 2017, We244, Prague, Czech (7/1721 2017)

R. Ozawa, ♦S. Hayami, and Y. Motome,
"Largescale simulation for formation of skyrmion srystals with a high topological number in itinerant magnets",
1st International Symposium on Research and Education of Computational Science (RECS), Hongo, Tokyo (11/2930 2016)

R. Ozawa, ♦S. Hayami, K. Barros, G. W. Chern, Y. Motome, and C. D. Batista,
"Vortex Crystals with Chiral Stripes in Itinerant Magnets",
The International Conference on SCES, MoP051, Hangzhou, China (5/813 2016)

R. Ozawa, ♦S. Hayami, K. Barros, G. W. Chern, Y. Motome, and C. D. Batista,
"Vortex Crystals with Chiral Stripes in Itinerant Magnets",
International USMM & CMSI Workshop: Frontiers of Materials and Correlated Electron Science from Bulk to Thin Films and Interfaces, P26, Hongo, Tokyo, Japan (1/59 2016)

Y. Sugita, ♦S. Hayami, and Y. Motome,
"Exitionic Multipole Order in a dp Model with Parity Mixing",
TMU International Symposium 2015 "New Quantum Phases Emerging from Novel Crystal Structure", P33, Tokyo Metropolitan University, Hachioji, Tokyo, Japan (9/2425 2015)

♦S. Hayami, H. Kusunose and Y. Motome,
"Spontaneous parity breaking by electronic orders in spinorbit coupled systems",
Novel States in SpinOrbit Coupled Quantum Matter: from Models to Materials, The Kavli institude for Theoretical Physics, University of California, Santa Barbara, United States (7/2731 2015)

R. Ozawa, ♦S. Hayami, M. Udagawa, Y. Motome, K. Barros, G. W. Chern, and C. D. Batista,
"Meron crystals with spin scalar chiral stripes",
20th International Conference on Magnetism (ICM2015), FR.EP36, Barcerona, Spain (7/510 2015)

Y. Sugita, ♦S. Hayami, and Y. Motome,
"Exitionic Multipole Order in a dp Model with Parity Mixing",
20th International Conference on Magnetism (ICM2015), TU.AP81, Barcerona, Spain (7/510 2015)

R. Ozawa, K. Barros, ♦S. Hayami, G. W. Chern, M. Udagawa, Y. Motome, and C. D. Batista,
"Meron crystals with scalar chiral stripes",
Workshop on "Topologial Magnets", P11, RIKEN, Wako, Saitama, Japan (5/2527 2015)

Y. Sugita, ♦S. Hayami, and Y. Motome,
"Exitionic Multipole Order in a dp Model with Parity Mixing",
The 2nd ISSPMPIPKS Joint Workshop "Dyanmics of Strongly Correlated Systems" (DSCS2015), PS14, ISSP, Kashiwa, Chiba, Japan (3/3031 2015)

R. Ozawa, ♦S. Hayami, M. Udagawa, Y. Motome, K. Barros, G. W. Chern, and C. D. Batista,
"Meron Crystals with Spin Scalar Chiral Stripes",
The 2nd ISSPMPIPKS Joint Workshop "Dyanmics of Strongly Correlated Systems" (DSCS2015), PS18, ISSP, Kashiwa, Chiba, Japan (3/3031 2015)

Y. Motome and ♦S. Hayami,
"Hidden frustration in multipleQ ordered metals",
The International Conference on Highly Frustrated Magnetism 2014, We220, Cambridge, UK, (7/711 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Spontaneous parity breaking by electronic orders in spinorbit coupled systems",
The International Conference on SCES, We220, Grenoble, France, (7/711 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Multipole ordering by local parity mixing",
The International Conference on SCES, We221, Grenoble, France (7/711 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Spontaneous toroidal order in metals",
The New Generation in Strongly Correlated Electron Systems 2014, 16th, Nice, France (6/1620 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Spontaneous toroidal order in metals",
The OIST International Workshop on Novel Quantum Materials and Phases, 15thP22, OIST, Kunigami District, Okinawa, Japan (5/1417 2014)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"3D Dirac electrons on a cubic lattice with noncoplanar multipleQ order",
The OIST International Workshop on Novel Quantum Materials and Phases, 14thP7, OIST, Kunigami District, Okinawa, Japan (5/1417 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Spontaneous Toroidal Order in Metals",
The 6th IndoJapan Seminar Physics and Design of MultiFunctional Correlated Materials, P27, Univeristy of Tokyo, Bunkyo, Tokyo, Japan (3/2425 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Toroidal Order in Metals on Hexagonal Lattices",
FIRST International Symposium on Topological Quantum Technology, P48, University of Tokyo, Bunkyo, Tokyo, Japan (1/2730 2014)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Exploring topological insulators under a tripleQ magnetic order",
RIKENAPW joint workshop "Highlights in condensed matter physics", R043, RIKEN, Wako, Saitama, Japan, (1/2325 2014)

♦S. Hayami, H. Kusunose, and Y. Motome,
"Toroidal ordering in metals: band shift, magnetotransport, and magnetoelectric effect",
The FIRSTQS2C Workshop on "Emergent Phenomena of Correlated Materials", P52, Shinagawa, Tokyo, Japan, (11/1316 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"3D Dirac Electrons and Peculiar Surface States on a Cubic Lattice",
International Workshop for Young Researchers on Topological Quantum Phenomena in Condensed Matter with Broken Symmetries 2013, P08, Okinawa, Japan (10/2226 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Threedimensional Dirac Electrons with Noncoplanar MultipleQ Order in a Kondo Lattice Model",
The International Conference on SCES, 8P226, University of Tokyo, Bunkyo, Tokyo, Japan (8/59 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Threedimensional Dirac Electrons with Noncoplanar MultipleQ Order in a Cubic Lattice System",
QS2C Theory Forum: International Symposium on “Strongly Correlated Quantum Science”, P31, University of Tokyo, Bunkyo, Tokyo, Japan (1/2629 2013)

♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial Disorder and MetalInsulator Transition in the Periodic Anderson Model on a Triangular Lattice",
The Fourth International Workshop on the Dual Nature of fElectrons, P16, Himeji, Hyogo, Japan (7/46 2012)

♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial Disorder in a Frustrated Periodic Anderson Model",
Novel Quantum States in Condensed Matter 2011 Correlation, Frustration and Topology, PSB2, YITP, Kyoto University, Kyoto, Japan (11/712/9 2011)

♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial Disorder in the Periodic Anderson Model on a Triangular Lattice",
26th International Conference on Low Temperature Physics, 13PC025, Beijing, China (8/1017 2011)
Domesitc Conference, JPS Meeting (Poster)

♦A. Kirikoshi, ♦S. Hayami,
"Magnetoelecric effect in antiferro/ferrimagnetic toroidal metal",
Transformative Research Areas (A) "Asymmetric Quantum Matters" FY2024 Area General Meeting/Public Research Kickoff Meeting, Higashi Hiroshima Arts & Culture Hall Kurara, Hiroshima (5/2931 2024)

♦S. Kanda, ♦S. Hayami,
"Nonlinear optical response originating from chiraltype antisymmetric spinorbit interaction",
Transformative Research Areas (A) "Asymmetric Quantum Matters" FY2024 Area General Meeting/Public Research Kickoff Meeting, Higashi Hiroshima Arts & Culture Hall Kurara, Hiroshima (5/2931 2024)

♦A. Inda, ♦S. Hayami,
"Quantitative analysis of chirality based on electric toroidal monopole",
Transformative Research Areas (A) "Asymmetric Quantum Matters" FY2024 Area General Meeting/Public Research Kickoff Meeting, Higashi Hiroshima Arts & Culture Hall Kurara, Hiroshima (5/2931 2024)

R. Oiwa, ♦A. Inda, ♦S. Hayami, T. Nomoto, R. Arita, and H. Kusunose,
"Symmetryadapted closest Wannier tightbinding models",
FYR05 QLC meeting, The University of Tokyo, ISSP, Chiba (12/2628 2023) 
S. Okumura, ♦S. Hayami, Y. Kato and Y. Motome,
"Effects of Qdependent Anisotropy on Magnetic Hedgehog Lattices in Centrosymmetric Systems",
FYR05 QLC meeting, The University of Tokyo, ISSP, Chiba (12/2628 2023) 
♦A. Inda and ♦S. Hayami,
"Nonlinear transverse magnetic susceptibility under ferroaxial ordered state",
GrantinAid for Transformative Research Areas (A), "[in Japanese] アシンメトリが彩る量子物質の可視化・設計・創出", Topical meeting, Hokkaido University, Hokkaido (8/3031 2023) 
♦A. Kirikoshi and ♦S. Hayami,
"Rotational Response Induced by Electric Toroidal Dipole",
GrantinAid for Transformative Research Areas (A), "[in Japanese] アシンメトリが彩る量子物質の可視化・設計・創出", Topical meeting, Hokkaido University, Hokkaido (8/3031 2023) 
♦R. Yambe and ♦S. Hayami,
"A plethora of skyrmoin crystal phases in honeycomb itinerant magnets",
ISSP workshop "[in Japanese] カイラル物質科学の新展開", ISSP, Chiba (12/2224 2022) 
♦S. Hayami,
"Skyrmion crystals in centrosymmetric systems with staggered DzyaloshinskiiMoriya interaction",
FYR04 QLC meeting, Nagoya University (12/810 2022) 
♦A. Kirikoshi, ♦S. Hayami,
"Microscopic Mechanism for Intrinsic Nonlinear Hall Effect in Noncollinear Antiferromagnetic Metals",
FYR04 QLC meeting, Nagoya University (12/810 2022) 
♦K. Okigami, ♦R. Yambe, ♦S. Hayami,
"Engineering a Skyrmion Crystal in Ferromagnetic/Antiferromagnetic Bilayers Based on Magnetic Frustration Mechanism",
FYR04 QLC meeting, Nagoya University (12/810 2022) 
♦R. Yambe, ♦S. Hayami,
"Sublatticedependent skyrmion crystals in an itinerant honeycomb magnet",
FYR04 QLC meeting, Nagoya University (12/810 2022) 
♦A. Kirikoshi and ♦S. Hayami,
"Intrinsic nonlinear Hall effect in antiferromagnetic metals",
Asymmetric Quantum 1st conference, Osaka University, PS03 (8/910 2022)

S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Magnetic Monopole Crystals in Chiral Metals: Stabilization Mechanism and Fielddriven Topological Transitions",
FYR02 QLC meeting, online meeting (12/2125 2020) 
♦R. Yambe and ♦S. Hayami,
"Skyrmion Crystals in Centrosymmetric Itinerant Magnets without Horizontal Mirror Plane",
FYR02 QLC meeting, online meeting (12/2125 2020) 
♦T. Matsumoto and ♦S. Hayami,
"Nonreciprocal magnons due to magnetic toroidal multipoles in noncentrosymmetric magnets",
FYR02 QLC meeting, online meeting (12/2125 2020) 
♦M. Yatsushiro and ♦S. Hayami,
"Electric toroidal quadrupole order breaking the spatial inversion symmetry in CeCoSi",
FYR02 QLC meeting, online meeting (12/2125 2020) 
♦M. Yatsushiro and ♦S. Hayami,
"Electric field gradient at Co site under antiferroquadrupole orderings in CeCoSi",
JPhysics Annual Meeting FY2019, Kobe University, Hyogo (1/68 2020) 
S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Chiral 3Q and 4Q hedgehog lattices in 3D spincharge coupled systems",
JSPS CoretoCore Topical Meeting "Symposium on fundamental properties of chiral materials", Kanda Sanso, Hiroshima (1/2729 2019) 
S. Okumura, ♦S. Hayami, Y. Kato, and Y. Motome,
"Numerical study of topological spin textures in 3D spincharge coupled systems",
The 4th Annual Meeting "Topological Materials Science", Nagoya University, Aichi (1/2224 2019) 
♦T. Matsumoto and ♦S. Hayami,
"Toroidal multipole and its nonreciprocal magnon excitations in breathing kagome magnets",
JPhysics: Tropical Topical Meeting, Ryukyu University, Okinawa (12/1314 2018) 
♦T. Matsumoto and ♦S. Hayami,
"Toroidal multipole and its nonreciprocal magnon excitations in breathing kagome magnets",
Frontiers of spin physics, Kyoto University, Kyoto (10/3111/2 2018) 
♦M. Yatsushiro and ♦S. Hayami,
"Toroidal multipoles induced under the oddparity crystalline electric field and magnetoelectric effect",
Japan Physical Society Meeting, 2018 Autumn Meeting, 10aPS20, Doshisha University, Kyoto (9/912 2018) 
♦T. Matsumoto and ♦S. Hayami,
"Nonreciprocal magnon excitations on a breathing kagome lattice",
Japan Physical Society Meeting, 2018 Autumn Meeting, 9aPS95, Doshisha University, Kyoto (9/912 2018) 
♦S. Hayami and H. Kusunose,
"Hybrid multipoles in orbital hybridization",
JPhysics Annual Meeting 2018, University of Tokyo (ISSP), Chiba (3/1517 2018) 
A. Oyamada, E. Yamamoto, Y. Haga, ♦S. Hayami, H. Kusunose, and Y. Motome,
"anomalous Hall effect in a triangularlattice antiferromagnet UNi4B",
Japan Physical Society Meeting, 71st Annual Meeting, 17pKPS23, Osaka University, Osaka (3/1720 2017) 
♦S. Hayami, H. Kusunose, and Y. Motome,
"Emergent spinvalleyorbital physics by spontaneous parity breaking",
JPhysics Annual Meeting 2016, P18, Hokkaido University, Hokkaido (5/2628 2016) 
A. Oyamada, E. Yamamoto, Y. Haga, ♦S. Hayami, H. Kusunose, and Y. Motome,
"Weak ferromagnetism and anomalous Hall effect in a triangularlattice antiferromagnet UNi4B",
Japan Physical Society Meeting, 71st Annual Meeting, 22aPS48, Tohoku Gakuin University, Miyagi (3/1922 2016) 
R. Ozawa, ♦S. Hayami, Kipton Barros, GiaWei Chern, Y. Motome, and Cristian D. Batista,
"Vortex Crystals with Chiral Stripes in Itinerant Magnets",
9th Joint Research Meeting of MEXT National Projects on CondensedMatter Science, P47, University of Tokyo, Tokyo (11/1315 2015) 
♦S. Hayami, H. Kusunose, and Y. Motome,
"Spontaneous parity breaking in spinorbital coupled systems",
9th Joint Research Meeting of MEXT National Projects on CondensedMatter Science, P34, University of Tokyo, Tokyo (11/1315 2015) 
♦S. Hayami, H. Kusunose, and Y. Motome,
"Asymmetric magnon excitations induced by extended toroidal multipoles",
9th Joint Research Meeting of MEXT National Projects on CondensedMatter Science, P34, University of Tokyo, Tokyo (11/1315 2015) 
A. Oyamada, E. Yamamoto, Y. Haga, ♦S. Hayami, H. Kusunose, and Y. Motome,
"Anomalous Hall effect in the ordered state of a triangularlattice antiferromagnet UNi4B",
Japan Physical Society Meeting, 2015 Autumn Meeting, 17aPS129, Kansai University, Osaka (9/1619 2015) 
♦S. Hayami, H. Kusunose, and Y. Motome,
"Torodial ordering in metals: band shift, magnetotransport, and magnetoelectric effect",
7th Joint Research Meeting of MEXT National Projects on CondensedMatter Science, P26, University of Tokyo, Bunkyo, Tokyo (12/12 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Possibility of topological insulator under tripleQmagnetic ordering",
7th Joint Research Meeting of MEXT National Projects on CondensedMatter Science , P27, University of Tokyo, Bunkyo, Tokyo (12/12 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"MultipleQ ordering and charge ordering in cubic lattice systems",
Emergence of Heavy Electrons and Their Ordering, 4th workshop, PS89, Tokyo Institute of Technology, Tokyo (1/1214 2013)

♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Noncoplanar multipleQ magnetic ordering with threedimensional Dirac electrons in the periodic Anderson model on a cubic lattice",
6th Joint Research Meeting of MEXT National Projects on CondensedMatter Science, P15, University of Tokyo, Tokyo (11/2728 2012) 
♦S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"MultipleQ magnetic ordering with charge ordering and Dirac electrons in the periodic Anderson model on a cubic lattice",
Physics of Quantum Spin Systems, PSA11, YITP, Kyoto University, Kyoto (11/1214 2012) 
♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial disordered state in the periodic Anderson model on a triangular lattice effecs of dopoing, magnetic field, and spin anisotropy",
Meeting "Frustrated system", P11, Osaka University, Suita, Osaka (1/68 2012) 
♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial disordered state in the periodic Anderson model on a triangular lattice",
7th meeting "Frustration and spin, charge, orbital, and lattice degrees of freedom」, P16, Hikone view Hotel, Shiga, (7/12 2011) 
[poster] ♦S. Hayami, M. Udagawa, and Y. Motome,
"Partial disordered state in the periodic Anderson model on a triangular lattice",
"Emergence of Heavy Electrons and Their Ordering" 3rd workshop, PS117, ISSP, Kashiwa, Chiba (6/2325 2011)