Kramers degeneracy in a magnetic field and Zeeman spin-orbit coupling in antiferromagnetic conductors

Abstract

In this article, I study magnetic response of electron wavefunctions in a commensurate collinear antiferromagnet. I show that, at a special set of momenta, hidden anti-unitary symmetry protects Kramers degeneracy of Bloch eigenstates against a magnetic field, pointing transversely to staggered magnetization. Hence a substantial momentum dependence of the transverse g-factor in the Zeeman term, turning the latter into a spin-orbit coupling, that may be present in materials from chromium to borocarbides, cuprates, pnictides, as well as organic and heavy fermion conductors.

published version

References in corpus (1)

• Magnetic Order versus superconductivity in the Iron-based layered La(O1-xFx)FeAs systems

Cited by in corpus (4)

• Kramers degeneracy in a magnetic field and Zeeman spin-orbit coupling in antiferromagnets
• Quantum oscillations in antiferromagnetic conductors with small carrier pockets
• Electric excitation of spin resonance in antiferromagnetic conductors
• Fermi Surface Reconstruction by Dynamic Magnetic Fluctuations and Spin-Charge Separation Near an O(3) Quantum Critical Point