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Anomalous helical edge states in a non-Hermitian Chern insulator

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arxiv 1805.09632 v2 pith:GQOYJI5T submitted 2018-05-24 cond-mat.mes-hall physics.opticsquant-ph

Kohei Kawabata , Ken Shiozaki , Masahito Ueda This is my paper · ORCID
classification cond-mat.mes-hallphysics.opticsquant-ph
keywords chernedgeinsulatornon-hermitianstatesanomaloushelicaladdition
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A non-Hermitian extension of a Chern insulator and its bulk-boundary correspondence are investigated. It is shown that in addition to the robust chiral edge states that reflect the nontrivial topology of the bulk (nonzero Chern number), anomalous helical edge states localized only at one edge can appear, which are unique to the non-Hermitian Chern insulator.

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