Absence of cross-sublattice spin pumping and spin-transfer torques in collinear antiferromagnets
Abstract
We resolve the debate over the existence and magnitude of cross-sublattice (CS) contributions to spin pumping and spin-transfer torques in a two-sublattice antiferromagnet connected to a non-magnetic metal. Guided by symmetry considerations, we first relate the controversial CS terms to specific components in the spin conductance matrix. Then, we quantify these components by studying the spin-dependent electron scattering on a fully compensated interface. We ascertain the absence of all CS contributions in the collinear regime. Even in the non-collinear regime, the CS contributions only constitute a higher-order correction to the existing theory.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 01, 2023
- Source ID
- 10.1063/5.0159062
Entities
People
- Junyu Tang
- Ran Cheng
Organizations
- Air Force Office of Scientific Research
- University of California