Magnonic quantum spin Hall state in the zigzag and stripe phases of the antiferromagnetic honeycomb lattice

Ki Hoon Lee, Suk Bum Chung, Kisoo Park, Je Geun Park

Research output: Contribution to journalArticlepeer-review

37 Scopus citations

Abstract

We investigated the topological property of magnon bands in the collinear magnetic orders of zigzag and stripe phases for the antiferromagnetic honeycomb lattice and identified Berry curvature and symmetry constraints on the magnon band structure. Different symmetries of both zigzag and stripe phases lead to different topological properties, in particular, the magnon bands of the stripe phase being disentangled with a finite Dzyaloshinskii-Moriya (DM) term with nonzero spin Chern number. This is corroborated by calculating the spin Nernst effect. Our study establishes the existence of a nontrivial magnon band topology for all observed collinear antiferromagnetic honeycomb lattices in the presence of the DM term.

Original languageEnglish
Article number180401
JournalPhysical Review B
Volume97
Issue number18
DOIs
StatePublished - 4 May 2018

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