Essential model parameters for nonreciprocal magnons in multisublattice systems

S Hayami, T Matsumoto - Physical Review B, 2022 - APS
We theoretically investigate the microscopic conditions for emergent nonreciprocal magnons
toward a unified understanding on the basis of a microscopic model analysis. We show that …

Spin-orbital-momentum locking under odd-parity magnetic quadrupole ordering

S Hayami, H Kusunose - Physical Review B, 2021 - APS
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 …