This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/28666 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevMaterials.5.L091201 in citations.
Z 2 topology of bismuth
Z 2 topology of bismuth
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 contra...
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Personal Name(s): | Aguilera, Irene (Corresponding author) |
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Kim, Hyun-Jung / Friedrich, Christoph / Bihlmayer, Gustav / Blügel, Stefan | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 Photovoltaik; IEK-5 JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 |
Published in: | Physical review materials, 5 (2021) 9, S. L091201 |
Imprint: |
College Park, MD
APS
2021
|
DOI: |
10.1103/PhysRevMaterials.5.L091201 |
Document Type: |
Journal Article |
Research Program: |
Topological Matter |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevMaterials.5.L091201 in citations.
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. |