Extrinsic anomalous Hall effect in altermagnets
Abstract
We find the extrinsic anomalous Hall conductivity (AHC) to be comparable to the intrinsic one in roughly half of the altermagnetic spin Laue groups in the limit of large exchange splitting. In materials with a finite Dzyaloshinskii-Moriya type interaction, the extrinsic contribution is essential even in the clean limit. In other altermagnets it is mostly negligible. This peculiar behavior is linked to the nonanalytic dependence of the intrinsic AHC on spin-orbit coupling. Both originate from the lifting of the spin degeneracy along the nodal planes as the weak spin-orbit coupling breaks the nonrelativistic spin symmetry.
Fields of Study & Subjects
Topological Materials and Phenomena
Magnetic properties of thin films
Advanced Condensed Matter Physics
Publication details
- Journal / source
- npj Quantum Materials
- Publisher
- Springer Science and Business Media LLC
- Volume
- 11
- Issue
- 1
- Publication date
- 30 May 2026
- Language
- EN