Exceptional topological insulators
| Autor: | Anastasiia Skurativska, Tomáš Bzdušek, Titus Neupert, Frank Schindler, Ronny Thomale, M. Michael Denner, Mark H. Fischer |
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| Přispěvatelé: | University of Zurich, Denner, M Michael |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Electronic properties and materials
530 Physics Science FOS: Physical sciences General Physics and Astronomy Weyl semimetal 1600 General Chemistry Genetics and Molecular Biology 10192 Physics Institute 01 natural sciences Article General Biochemistry Genetics and Molecular Biology 010305 fluids & plasmas Theoretical physics Condensed Matter - Strongly Correlated Electrons 1300 General Biochemistry Genetics and Molecular Biology Mesoscale and Nanoscale Physics (cond-mat.mes-hall) 0103 physical sciences Topological insulators 010306 general physics Eigenvalues and eigenvectors Physics Multidisciplinary Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter - Mesoscale and Nanoscale Physics General Chemistry Hermitian matrix 3100 General Physics and Astronomy Cover (topology) Topological insulator General Biochemistry State of matter Quasiparticle Embedding Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Nature Communications, Vol 12, Iss 1, Pp 1-7 (2021) Nature Communications |
| ISSN: | 2041-1723 |
| Popis: | We introduce the exceptional topological insulator (ETI), a non-Hermitian topological state of matter that features exotic non-Hermitian surface states which can only exist within the three-dimensional topological bulk embedding. We show how this phase can evolve from a Weyl semimetal or Hermitian three-dimensional topological insulator close to criticality when quasiparticles acquire a finite lifetime. The ETI does not require any symmetry to be stabilized. It is characterized by a bulk energy point gap, and exhibits robust surface states that cover the bulk gap as a single sheet of complex eigenvalues or with a single exceptional point. The ETI can be induced universally in gapless solid-state systems, thereby setting a paradigm for non-Hermitian topological matter. 6+ pages, 3 figures; 21 pages Supplemental Material |
| Databáze: | OpenAIRE |
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