PT symmetry protected non-Hermitian topological systems

We study PT symmetry protected topological phase in non-Hermitian 1D and 2D systems. We show that topological phase exist in non-Hermitian PT symmetric systems for both gapped and gapless systems and discuss appearance of exceptional points. We apply our formalism to a complex extension of the SSH m...

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Bibliographic Details
Published in:Scientific reports 2018-11, Vol.8 (1), p.17416-5, Article 17416
Main Authors: Yuce, C., Oztas, Z.
Format: Article
Language:English
Subjects:
639/301/1019/1022
639/301/119/2792/4128
Eigenvalues
Energy
Humanities and Social Sciences
multidisciplinary
Phase transitions
Photonics
Science
Science (multidisciplinary)
Symmetry
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Summary:We study PT symmetry protected topological phase in non-Hermitian 1D and 2D systems. We show that topological phase exist in non-Hermitian PT symmetric systems for both gapped and gapless systems and discuss appearance of exceptional points. We apply our formalism to a complex extension of the SSH model, topological semimetals and nodal superconductors.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-35795-5