Trigonal warping in bilayer graphene: Energy versus entanglement spectrum

URN to cite this document:: urn:nbn:de:bvb:355-epub-348829
DOI to cite this document:: 10.5283/epub.34882

Predin, Sonja ; Wenk, Paul

; Schliemann, John

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Date of publication of this fulltext: 24 Nov 2016 13:10

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Abstract

We present a mainly analytical study of the entanglement spectrum of Bernal-stacked graphene bilayers in the presence of trigonal warping in the energy spectrum. Upon tracing out one layer, the entanglement spectrum shows qualitative geometric differences to the energy spectrum of a graphene monolayer. However, topological quantities such as Berry-phase-type contributions to Chern numbers agree. ...