Axionic antiferromagnetic insulator phase in a correlated and spin-orbit coupled system

Akihiko Sekine, Kentaro Nomura

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

We study theoretically a three-dimensional correlated and spin-orbit coupled system, the half-filled extended Fu-Kane-Mele-Hubbard model on a diamond lattice, focusing on the topological magnetoelectric response of the antiferromagnetic insulator phase. In the antiferromagnetic insulator phase, the Dirac-like low-energy effective Hamiltonian is obtained. Then the theta term, which results in the magnetoelectric response, is derived as a consequence of the chiral anomaly. The realization of the dynamical axion field in our model is discussed. The relation with a symmetry broken phase induced by interactions in lattice quantum chromodynamics is also discussed.

Original languageEnglish
Article number104709
Journaljournal of the physical society of japan
Volume83
Issue number10
DOIs
Publication statusPublished - 2014 Oct 15

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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