日本物理学会
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作者:Satoru Hayami , Hiroaki Kusunose , Yukitoshi Motome
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (5)JPS
摘要:The effects of spontaneous toroidal ordering on magnetic excitation are theoretically investigated for a localized spin model that includes a staggered Dzyaloshinsky–Moriya interaction and anisotropic exchange interactions, which arise from the antisymmetric spin–orbit coupl...
作者:Satoru Hayami , Hiroaki Kusunose
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2018, Vol.87 (3)JPS
摘要:We derive the quantum-mechanical operator expressions of multipoles under the space-time inversion group. We elucidate that electric and magnetic toroidal multipoles, in addition to ordinary non-toroidal ones, are fundamental pieces to express arbitrary electronic degrees of free...
作者:Satoru Hayami , Hiroaki Kusunose , Yukitoshi Motome
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2019, Vol.88 (6)JPS
摘要:We report our theoretical study on nucleation of a magnetic vortex around a nonmagnetic impurity doped into ferromagnets. The mechanism lies in the asymmetric Dzyaloshinskii–Moriya interaction arising from the breaking of spatial inversion symmetry by the impurity. By using ...
作者:Satoru Hayami , Yuki Yanagi , Hiroaki Kusunose
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2019, Vol.88 (12)JPS
摘要:We clarify the macroscopic symmetry and microscopic model-parameter conditions for emergence of spin-split electronic band structure in collinear antiferromagnets without atomic spin–orbit coupling. By using the microscopic multipole descriptions, we elucidate the fundamenta...
作者:Satoru Hayami , Kipton Barros ...
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2016, Vol.85 (10)JPS
摘要:We study noncoplanar magnetic ordering in frustrated itinerant magnets. For a family of Kondo square lattice models with classical local moments, we find that a double- Q noncoplanar vortex crystal has lower energy than the single- Q helical order expected from the Ruderman–...
作者:Satoru Hayami , Hiroaki Kusunose , Yukitoshi Motome
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2015, Vol.84 (6)JPS
摘要:Broken spatial inversion symmetry in spin–orbital coupled systems leads to a mixing between orbitals with different parity, which results in unusual electronic structures and transport properties. We theoretically investigate the possibility of multipole ordering induced by ...
作者:Ryota Yambe , Satoru Hayami
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2020, Vol.89 (1)JPS
摘要:We investigate the stability of multiple- Q spiral states in d – p electron systems with the strong spin–charge coupling. By using variational calculations on a square lattice, we find that the double- Q state with the scalar chirality density wave, which has been studied in...
作者:Satoru Hayami , Masafumi Udagawa , Yukitoshi Motome
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2011, Vol.80 (7)JPS
摘要:We report our theoretical results on the emergence of a partially disordered state at zero temperature and its detailed nature in the periodic Anderson model on a triangular lattice at half-filling. The partially disordered state is characterized by the coexistence of a collinear...
作者:Satoru Hayami , Masafumi Udagawa , Yukitoshi Motome
来源:[J].Journal of the Physical Society of Japan(IF 2.087), 2012, Vol.81 (10)JPS
摘要:The ground state of the periodic Anderson model on a triangular lattice is systematically investigated by mean-field approximation. We found that the model exhibits two different types of partially disordered states: one is at half filling and the other is at other commensur...

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