Year: 2025
Type: article
Abstract: The magnetic spin Hall effect is a time-reversal-odd phenomenon in which spin current is induced by the charge current. In the presence of a spin-orbit coupling and/or noncolinear magnetism, however, spin current is not uniquely defined. Instead, we study an intrinsic response of spin to an electric field gradient that describes the spin accumulation at the boundaries of magnetic systems. We derive a generic formula expressed by Bloch wave functions and apply it to a minimal model for representative altermagnets, ${\mathrm{RuO}}_{2}$ and ${\mathrm{MnF}}_{2}$. Our results show that the intrinsic spin accumulation can be nonzero in magnetic insulators in sharp contrast to the magnetic spin Hall conductivity.
DOI: 10.1103/gxpm-2gkq
Author: Atsuo Shitade
Institution: The University of Osaka
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4415337202