Topological states on the gold surface
- Gold surfaces host special electronic states that have been understood as a prototype of Shockley surface states. These surface states are commonly employed to benchmark the capability of angle-resolved photoemission spectroscopy (ARPES) and scanning tunnelling spectroscopy. Here we show that these Shockley surface states can be reinterpreted as topologically derived surface states (TDSSs) of a topological insulator (TI), a recently discovered quantum state. Based on band structure calculations, the Z2-type invariants of gold can be well-defined to characterize a TI. Further, our ARPES measurement validates TDSSs by detecting the dispersion of unoccupied surface states. The same TDSSs are also recognized on surfaces of other well-known noble metals (for example, silver, copper, platinum and palladium), which shines a new light on these long-known surface states.
| Author: | Binghai Yan, Benjamin StadtmüllerGND, Norman Haag, Sebastian Jakobs, Johannes Seidel, Dominik Jungkenn, Stefan Mathias, Mirko Cinchetti, Martin Aeschlimann, Claudia Felser |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-1129492 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/112949 |
| ISSN: | 2041-1723OPAC |
| Parent Title (English): | Nature Communications |
| Publisher: | Springer Science and Business Media LLC |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2015 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2024/05/14 |
| Volume: | 6 |
| Issue: | 1 |
| First Page: | 10167 |
| DOI: | https://doi.org/10.1038/ncomms10167 |
| Institutes: | Mathematisch-Naturwissenschaftlich-Technische Fakultät |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik | |
| Mathematisch-Naturwissenschaftlich-Technische Fakultät / Institut für Physik / Lehrstuhl für Experimentalphysik II | |
| Dewey Decimal Classification: | 5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik |
| Licence (German): |  CC-BY 4.0: Creative Commons: Namensnennung |
