Review Article

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (6)"
Kotai Butsuri 56(7), 333353 (2021)

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (5)"
Kotai Butsuri 56(4), 171188 (2021)

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (4)"
Kotai Butsuri 56(1), 119 (2021)

H. Kusunose and S. Hayami,
"Generalization of microscopic multipoles and its applications to spontaneous orderings and crosscorrelated phenomena"
Kotai Butsuri 55(11), 523534 (2020)

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (3)"
Kotai Butsuri 55(8), 379396 (2020)

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (2)"
Kotai Butsuri 55(1), 111 (2020)

S. Hayami，M. Yatsushiro，Y. Yanagi，and H. Kusunose,
"Microscopic multipole description in condensed matter physics (1)"
Kotai Butsuri 54(3), 131145 (2019)

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)

S. Hayami，H. Kusunose，and Y. Motome,
"Spontaneous breaking of space inversion symmetry in itinerant electron system Unconventional multipole ordering, spinvalley splitting, and offdiagonal response"
Kotai Butsuri 50(5), 217234 (2015)
Preprint

T. Matsumoto and S. Hayami,
"Nonreciprocal magnon excitations by the DzyaloshinskiiMoriya interaction on the basis of bond magnetic toroidal multipoles"
Preprint (arXiv:2107.12743, Condensed Matter)

S. Hayami and R. Yambe,
"Meronantimeron crystals in noncentrosymmetric itinerant magnets on a triangular lattice"
Preprint (arXiv:2107.03501, Condensed Matter)

S. Hayami and R. Yambe,
"Locking of skyrmion cores on a centrosymmetric discrete lattice: onsite versus offsite"
Preprint (arXiv:2107.03500, Condensed Matter)

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

S. Hayami and Y. Motome,
"Topological spin crystals by itinerant frustration"
Preprint (arXiv:2103.10647, Condensed Matter)

S. Hayami, T. Okubo, and Y. Motome,
"Phase Shift in Skyrmion Crystals"
Preprint (arXiv:2005.03168, Condensed Matter)
Paper

S. Hayami and H. Kusunose,
"Spinorbitalmomentum locking under oddparity magnetic quadrupole ordering"
Phys. Rev. B 104, 045117 (2021)
Preprint (arXiv:2105.09444, Condensed Matter)

S. Hayami,
"Inplane magnetic fieldinduced skyrmion crystal in frustrated magnets with easyplane anisotropy"
Phys. Rev. B 103, 224418 (2021)

S. Hayami and R. Yambe,
"FieldDirection Sensitive Skyrmion Crystals in Cubic Chiral Systems: Implication to 4fElectron Compound EuPtSi"
J. Phys. Soc. Jpn. 90, 073705 (2021) [selected in Papers of Editors' Choice]
Preprint (arXiv:2106.00113, Condensed Matter)

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

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)

S. Hayami,
"Electronic Nematic Ordering Driven by Atomicscale Multipoles"
JPS Hot Topics 1, 035 (2021)

S. Hayami,
"Rich Electronic Nematic Orderings Realized by Atomicscale Electric Quadrupoles"
JPSJ News Comments 18, 06 (2021)

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 SpinOrbit Coupled Iridium Oxide Ca5Ir3O12"
J. Phys. Soc. Jpn. 90, 063702 (2021) [selected in Papers of Editors' Choice]

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,
"Spintexturedriven electrical transport in multiQ antiferromagnets"
Commun. Phys. 4, 58 (2021)

M. Hirschberger, S. Hayami, and Y. Tokura,
"Modeling a nanometric skyrmion lattice using anisotropic exchange interactions in a centrosymmetric host"
New J. Phys. 23, 023039 (2021)

S. Hayami and Y. Motome,
"Noncoplanar multipleQ spin textures by itinerant frustration: Effects of singleion anisotropy and bonddependent anisotropy"
Phys. Rev. B 103, 054422 (2021)
Preprint (arXiv:2011.13040, Condensed Matter)

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

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

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)

S. Hayami, Y. Yanagi, and H. Kusunose,
"Bottomup design of spinsplit and reshaped electronic band structures in spinorbitcoupling free antiferromagnets: Procedure on the basis of augmented multipoles"
Phys. Rev. B 102, 144441 (2020)
Preprint (arXiv:2008.10815, Condensed Matter)

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

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

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

S. Hayami,
"MultipleQ magnetism by anisotropic bilinearbiquadratic interactions in momentum space"
J. Magn. Magn. Mater. 513, 167181 (2020)

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)

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

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)

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

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

R. Yambe and S. Hayami,
"DoubleQ 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) 
S. Hayami, Y. Yanagi, and H. Kusunose,
"MomentumDependent Spin Splitting by Collinear Antiferromagnetic Ordering"
J. Phys. Soc. Jpn. 88, 123702 (2019)
Preprint (arXiv:1908.08680, Condensed Matter)

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)

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)

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

M. Yatsushiro and S. Hayami,
"AtomicScale Magnetic Toroidal Dipole under OddParity Hybridization"
J. Phys. Soc. Jpn. 88, 054708 (2019)
Preprint (arXiv:1903.04708, Condensed Matter)

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

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)

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

S. Hayami, M. Yatsushiro, Y. Yanagi, and H. Kusunose,
"Classification of atomicscale 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)

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

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)]
Preprint (arXiv:1712.02927, Condensed Matter)

S. Hayami, H. Kusunose, and Y. Motome,
"Emergent oddparity 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)

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)

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)

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

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

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)

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)

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

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

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

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

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)

S.Z. Lin and S. Hayami,
"GinzburgLandau theory for skyrmions in inversionsymmetric magnets with competing interactions"
Phys. Rev. B 93, 064430 (2016)
Preprint (arXiv:1512.05012, Condensed Matter)

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)

S. Hayami and Y. Motome,
"Topological semimetaltoinsulator phase transition between noncollinear and noncoplanar multipleQ states on a squaretotriangular lattice"
Phys. Rev. B 91, 075104 (2015)
Preprint (arXiv:1412.0752, Condensed Matter)

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

S. Hayami and Y. Motome,
"MultipleQ instability by (d2)dimensional connections of Fermi surfaces"
Phys. Rev. B 90, 060402(R) (2014)
Preprint (arXiv:1406.3119, Condensed Matter)

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)

S. Hayami, T. Misawa, Y. Yamaji, and Y. Motome,
"Threedimensional Dirac electrons on a cubic lattice with noncoplanar multipleQ order"
Phys. Rev. B 89, 085124 (2014)
Preprint (arXiv:1305.5031, Condensed Matter)

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

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

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

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

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

S. Hayami and Y. Motome,
"MultipleQ Magnetic States in SpinOrbit Coupled Metals"
IEEE Transactions on Magnetics 55, 1500107 (2018)

Y. Yanagi, S. Hayami, and H. Kusunose,
"Theory of magnetoelectric response in Co4Nb2O9"
Physica B: Condensed Matter 536, 107110 (2018)

S. Hayami, H. Kusunose, and Y. Motome,
"Meanfield study of correlationinduced antisymmetric spinorbit coupling in a twoorbital honeycomb model"
Physica B: Condensed Matter 536, 649653 (2018)

Y. Sugita, S. Hayami, and Y. Motome,
"Antisymmetric SpinOrbit Coupling in a dp Model on a Zigzag Chain"
Physics Procedia 75, 419425 (2015)

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)

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

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

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)