Szczegóły publikacji
Opis bibliograficzny
The in-plane band bending effect around Au islands grown on the $Bi_{2}Te_{3}$ topological insulator / Andrii NAUMOV, Maciej CHROBAK, Artur TREMBUŁOWICZ, Michał JURCZYSZYN, Krzysztof MAĆKOSZ, Joanna STĘPIEŃ, Marcin SIKORA, Marek PRZYBYLSKI // Surface Science ; ISSN 0039-6028. — 2024 — vol. 745 art. no. 122490, s. 1-6. — Bibliogr. s. 6, Abstr. — Publikacja dostępna online od: 2024-03-30. — Dod. afiliacja: M. Chrobak - ACMiN; A. Trembułowicz - University of Wrocław; K. Maćkosz - WFiIS AGH, Empa-Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Mechanics of Materials and Nanostructures; M. Przybylski - ACMIN
Autorzy (8)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 152808 |
|---|---|
| Data dodania do BaDAP | 2024-05-14 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.susc.2024.122490 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Czasopismo/seria | Surface Science |
Abstract
We have utilized scanning tunneling microscopy and spectroscopy (STM/STS) as well as x-ray linear dichroism (XLD) along with DFT calculations to determine the structural and electronic changes of the gold-covered nonstoichiometric Bi2Te3 single crystal surface. XLD spectra supported by a numerical simulation of several configurations show that at low coverage (< 1.0 ML) gold forms insoluble islands, while for higher coverage (> 1.0 ML) mixing at the Au/Bi2Te3 interface may occur. For local electronic characterization around stand-alone Au islands, small coverages were selected for which the inter-island distance is large enough to avoid overlapping island-wide effects. STS spectra reveal that for small coverages the topological surface states (TSS) are preserved. However, at a distance of about 10 nm from an Au island, by approaching the islands, the electronic structure gradually changes. This is manifested by a gradual shift of the STS spectra to more negative energies with respect to the pristine surface. The results are discussed in view of possible Au-Bi2Te3 mixing, a local charge transfer and the presence of in-plane downward band bending.
