Reference : The topological Anderson insulator phase in the Kane-Mele model
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
The topological Anderson insulator phase in the Kane-Mele model
Orth, Christoph [University of Basel]
Sekera, Tibor [University of Basel]
Bruder, Christoph [University of Basel]
Schmidt, Thomas mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Physics and Materials Science Research Unit >]
Scientific Reports
Nature Publishing Group
Yes (verified by ORBilu)
United Kingdom
[en] It has been proposed that adding disorder to a topologically trivial mercury telluride/cadmium telluride (HgTe/CdTe) quantum well can induce a transition to a topologically nontrivial state. The resulting state was termed topological Anderson insulator and was found in computer simulations of the Bernevig-Hughes-Zhang model. Here, we show that the topological Anderson insulator is a more universal phenomenon and also appears in the Kane-Mele model of topological insulators on a honeycomb lattice. We numerically investigate the interplay of the relevant parameters, and establish the parameter range in which the topological Anderson insulator exists. A staggered sublattice potential turns out to be a necessary condition for the transition to the topological Anderson insulator. For weak enough disorder, a calculation based on the lowest-order Born approximation reproduces quantitatively the numerical data. Our results thus considerably increase the number of candidate materials for the topological Anderson insulator phase.
Fonds National de la Recherche - FnR ; Swiss National Science Foundation

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