Quantum anomalous Hall effects in graphene from proximity-induced uniform and staggered spin-orbit and exchange coupling

URN to cite this document:: urn:nbn:de:bvb:355-epub-438315
DOI to cite this document:: 10.5283/epub.43831

Högl, Petra ; Frank, Tobias

; Zollner, Klaus ; Kochan, Denis ; Gmitra, Martin ; Fabian, Jaroslav

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Date of publication of this fulltext: 28 Sep 2020 05:29

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Abstract

We investigate an effective model of proximity modified graphene (or symmetrylike materials) with broken time-reversal symmetry. We predict the appearance of quantum anomalous Hall phases by computing bulk band gap and Chern numbers for benchmark combinations of system parameters. Allowing for staggered exchange field enables quantum anomalous Hall effect in flat graphene with Chern number C = 1. ...