Momentum-dependent spin splitting by collinear antiferromagnetic ordering

Satoru Hayami, Yuki Yanagi, Hiroaki Kusunose

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We clarify the macroscopic symmetry and microscopic model-parameter conditions for emergence of spin-split electronic band structure in collinear antiferromagnets without atomic spin–orbit coupling. By using the microscopic multipole descriptions, we elucidate the fundamental degree of freedom in a cluster unit of an antiferromagnet giving rise to an effective spin–orbit interaction through the anisotropic kinetic motions of electrons. We show a correspondence of the ordering patterns and resultant momentum-dependent spin splitting for 32 crystallographic point groups after demonstrating two intuitive examples of four-sublattice pyrochlore and tetragonal systems. Our study unveils potential features of collinear antiferromagnets with considerably weak spin–orbit coupling in light-element materials and 3d transition metal oxides, which can be utilized for a spin-current generation by electric (thermal) current and a magneto-striction effect.

Original languageEnglish
Article number123702
Journaljournal of the physical society of japan
Volume88
Issue number12
DOIs
Publication statusPublished - 2019

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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