Entanglement entropy and entanglement spectrum of Bi Sb (1 1 1) bilayers.

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ID: 97147
2018
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Abstract
We study topological properties of Bi Sb bilayers in the (1 1 1) plane using entanglement measures. Electronic structures are investigated within multi-orbital tight-binding model and structural stability is confirmed through first-principles calculations. The topologically non-trivial nature of the bismuth bilayer is proved by the presence of spectral flow in the entanglement spectrum. We consider topological phase transitions driven by a composition change x, an applied external electric field in Bi bilayers and strain in Sb bilayers. Composition- and strain-induced phase transitions reveal a finite discontinuity in the entanglement entropy. This quantity remains a continuous function of the electric field strength, but shows a finite discontinuity in the first derivative. We relate the difference in behavior of the entanglement entropy to the breaking of inversion symmetry in the last case.
Reference Key
brzeziska2018entanglementjournal Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Brzezińska, Marta;Bieniek, Maciej;Woźniak, Tomasz;Potasz, Paweł;Wójs, Arkadiusz;
Journal journal of physics condensed matter : an institute of physics journal
Year 2018
DOI
10.1088/1361-648X/aaaf54
URL
Keywords
probabilities born’s rule decoherence quantum darwinism quantum jumps

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