Journal Article

FZJ-2021-03546

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Z 2 topology of bismuth

Aguilera, I. (Corresponding author)FZJ* ; Kim, H.-J.FZJ* ; Friedrich, C.FZJ* ; Bihlmayer, G.FZJ* ; Blügel, S.FZJ*

2021
APS College Park, MD

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Please use a persistent id in citations: http://hdl.handle.net/2128/28666  doi:10.1103/PhysRevMaterials.5.L091201

Abstract: While first-principles calculations with different levels of sophistication predict a topologically trivial Z2 state for bulk bismuth, some photoemission experiments show surface states consistent with the interpretation of bismuth being in a topologically nontrivial Z2 state. We resolve this contradiction between theory and experiment by showing, based on quasiparticle self-consistent GW calculations, that the experimental surface states interpreted as supporting a nontrivial phase are actually consistent with a trivial Z2 invariant. We identify this contradiction as the result of a crosstalk effect arising from the extreme penetration depth of the surface states into the bulk of Bi. A film of Bi can be considered bulklike only for thicknesses of about 1000 bilayers (≈400 nm) and more.

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Contributing Institute(s):

1. Quanten-Theorie der Materialien (IAS-1)
2. Quanten-Theorie der Materialien (PGI-1)
3. JARA-FIT (JARA-FIT)
4. JARA - HPC (JARA-HPC)
5. Photovoltaik (IEK-5)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)

Appears in the scientific report 2021

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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