Peter Hlawenka, Konrad Siemensmeyer, Eugen Weschke, Andrei Varykhalov, Jaime Sánchez-Barriga, Natalya Y. Shitsevalova, A.V. Dukhnenko, V. B. Filipov, Slavomir Gabáni, Karol Flachbart, Oliver Rader, Emile D. L. Rienks
- SmB6 is predicted to be the first member of the intersection of topological insulators and Kondo insulators, strongly correlated materials in which the Fermi level lies in the gap of a many-body resonance that forms by hybridization between localized and itinerant states. While robust, surface-only conductivity at low temperature and the observation of surface states at the expected high symmetry points appear to confirm this prediction, we find both surface states at the (100) surface to be topologically trivial. We find the (Gamma) over bar state to appear Rashba split and explain the prominent (X) over bar state by a surface shift of the many-body resonance. We propose that the latter mechanism, which applies to several crystal terminations, can explain the unusual surface conductivity. While additional, as yet unobserved topological surface states cannot be excluded, our results show that a firm connection between the two material classes is still outstanding.
MetadatenAuthor details: | Peter Hlawenka, Konrad SiemensmeyerORCiD, Eugen Weschke, Andrei VarykhalovORCiDGND, Jaime Sánchez-BarrigaORCiDGND, Natalya Y. Shitsevalova, A.V. Dukhnenko, V. B. Filipov, Slavomir Gabáni, Karol FlachbartORCiD, Oliver RaderORCiDGND, Emile D. L. RienksORCiD |
---|
URN: | urn:nbn:de:kobv:517-opus4-424213 |
---|
DOI: | https://doi.org/10.25932/publishup-42421 |
---|
ISSN: | 1866-8372 |
---|
Title of parent work (English): | Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe |
---|
Publication series (Volume number): | Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe (612) |
---|
Publication type: | Postprint |
---|
Language: | English |
---|
Date of first publication: | 2019/02/15 |
---|
Publication year: | 2018 |
---|
Publishing institution: | Universität Potsdam |
---|
Release date: | 2019/02/15 |
---|
Tag: | SmB 6; gap; photoemission; states; topological Kondo-insulator |
---|
Issue: | 612 |
---|
Number of pages: | 7 |
---|
Source: | Nature Communications 9 (2018), Art. 517 DOI 10.1038/s41467-018-02908-7 |
---|
Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät |
---|
DDC classification: | 5 Naturwissenschaften und Mathematik / 50 Naturwissenschaften / 500 Naturwissenschaften und Mathematik |
---|
Peer review: | Referiert |
---|
Publishing method: | Open Access |
---|
License (German): | CC-BY - Namensnennung 4.0 International |
---|
External remark: | Bibliographieeintrag der Originalveröffentlichung/Quelle |
---|