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6 papers · 2 filters
Electric Ferro-Axial Moment as Nanometric Rotator and Source of Longitudinal Spin Current
Satoru Hayami, Rikuto Oiwa, Hiroaki Kusunose
An electric ferro-axial moment, which is characterized by a nonzero expectation value of a time-reversal-even axial vector, exhibits distinct spatial-inversion and time-reversal pr…
Analysis of model parameter dependences on the second-order nonlinear conductivity in -symmetric collinear antiferromagnetic metals with magnetic toroidal moment on zigzag chains
Megumi Yatsushiro, Rikuto Oiwa, Hiroaki Kusunose +1
A magnetic toroidal moment is a fundamental electronic degree of freedom in the absence of both spatial inversion and time-reversal symmetries and gives rise to novel multiferroic…
Systematic analysis method for nonlinear response tensors
Rikuto Oiwa, Hiroaki Kusunose
We propose a systematic analysis method for identifying essential parameters in various linear and nonlinear response tensors without which they vanish. By using the Keldysh formal…
Essential role of anisotropic magnetic dipole in anomalous Hall effect
Satoru Hayami, Hiroaki Kusunose
We theoretically investigate the anomalous Hall effect (AHE) that requires neither a net magnetization nor an external magnetic field in collinear antiferromagnets. We show that su…
Spin-orbital-momentum locking under odd-parity magnetic quadrupole ordering
Satoru Hayami, Hiroaki Kusunose
Odd-parity magnetic and magnetic toroidal multipoles in the absence of both spatial-inversion and time-reversal symmetries are sources of multiferroic and nonreciprocal optical phe…
Multipole classification in 122 magnetic point groups for unified understanding of multiferroic responses and transport phenomena
Megumi Yatsushiro, Hiroaki Kusunose, Satoru Hayami
Mutual interplay between the electronic degrees of freedom in solids, such as charge, spin, orbital, sublattice, and bond degrees of freedom, is a source of cross-correlated phenom…