Antiferromagnetic Chern Insulators in Noncentrosymmetric Systems

Physical Review Letters
Kun JiangZiqiang Wang

Abstract

We investigate a new class of topological antiferromagnetic (AF) Chern insulators driven by electronic interactions in two-dimensional systems without inversion symmetry. Despite the absence of a net magnetization, AF Chern insulators (AFCI) possess a nonzero Chern number C and exhibit the quantum anomalous Hall effect (QAHE). Their existence is guaranteed by the bifurcation of the boundary line of Weyl points between a quantum spin Hall insulator and a topologically trivial phase with the emergence of AF long-range order. As a concrete example, we study the phase structure of the honeycomb lattice Kane-Mele model as a function of the inversion-breaking ionic potential and the Hubbard interaction. We find an easy z axis C=1 AFCI phase and a spin-flop transition to a topologically trivial xy plane collinear antiferromagnet. We propose experimental realizations of the AFCI and QAHE in correlated electron materials and cold atom systems.

References

Oct 1, 1989·Physical Review. B, Condensed Matter·T LiP J Hirschfeld
Oct 26, 2005·Physical Review Letters·C L Kane, E J Mele
Dec 31, 2005·Physical Review Letters·C L Kane, E J Mele
Dec 16, 2006·Science·B Andrei BernevigShou-Cheng Zhang
Oct 13, 2007·Physical Review Letters·Congjun WuS Das Sarma
Jun 4, 2008·Physical Review Letters·Congjun Wu
Sep 12, 2008·Nature·Robert JördensTilman Esslinger
Apr 8, 2011·Physical Review Letters·Liang Fu
Nov 24, 2011·Physical Review Letters·Gang XuZhong Fang
Jan 5, 2013·Chemical Reviews·Mingsheng XuHongzheng Chen
Mar 15, 2013·Physical Review Letters·Kevin F Garrity, David Vanderbilt
Jun 18, 2016·Physical Review Letters·Tuomas I VanhalaPäivi Törmä
Sep 21, 2016·Nano Letters·P ZhouL Z Sun

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Citations

May 19, 2018·Physical Review Letters·Fei Xue, A H MacDonald
Feb 29, 2020·Physical Review Letters·Chengwang NiuYing Dai
May 28, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Tran C PhongBui D Hoi

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