Surface state conductivity in epitaxially grown Bi1-xSbx(111) films

Download statistics - Document (COUNTER):

Koch, Julian; Kröger, Philipp; Pfnür, Herbert; Tegenkamp, Christoph: Surface state conductivity in epitaxially grown Bi1-xSbx(111) films. In: New Journal of Physics 18 (2016), Nr. 9, 93012. DOI: http://dx.doi.org/10.1088/1367-2630/18/9/093012

Repository version

To cite the version in the repository, please use this identifier: https://doi.org/10.15488/751

Selected time period:

year: 
month: 

Sum total of downloads: 118




Thumbnail
Abstract: 
Topologically non-trivial surface states were reported first on ${\mathrm{Bi}}_{1-x}$Sb x bulk crystals. In this study we present transport measurements performed on thin ${\mathrm{Bi}}_{1-x}$Sb x -films (up to 24 nm thickness) grown epitaxially on Si(111) with various Sb-concentrations (up to x = 0.22). The analysis of the temperature dependency allowed us to distinguish between different transport channels originating from surface and bulk bands as well as impurity states. At temperatures below 30 K the transport is mediated by surface states while at higher temperatures activated transport via bulk channels sets in. The surface state conductivity and bulk band gaps can be tuned by the Sb-concentration and film thickness, respectively. For films as thin as 4 nm the surface state transport is strongly suppressed in contrast to Bi(111) films grown under identical conditions. The impurity channel is of intrinsic origin due to the growth and alloy formation process and turns out to be located at the buried interface.
License of this version: CC BY 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 2016
Appears in Collections:Fakultät für Mathematik und Physik

distribution of downloads over the selected time period:

downloads by country:

pos. country downloads
total perc.
1 image of flag of Germany Germany 107 90.68%
2 image of flag of China China 3 2.54%
3 image of flag of Russian Federation Russian Federation 2 1.69%
4 image of flag of Japan Japan 2 1.69%
5 image of flag of Vietnam Vietnam 1 0.85%
6 image of flag of Taiwan Taiwan 1 0.85%
7 image of flag of Philippines Philippines 1 0.85%
8 image of flag of Netherlands Netherlands 1 0.85%

Further download figures and rankings:


Hinweis

Zur Erhebung der Downloadstatistiken kommen entsprechend dem „COUNTER Code of Practice for e-Resources“ international anerkannte Regeln und Normen zur Anwendung. COUNTER ist eine internationale Non-Profit-Organisation, in der Bibliotheksverbände, Datenbankanbieter und Verlage gemeinsam an Standards zur Erhebung, Speicherung und Verarbeitung von Nutzungsdaten elektronischer Ressourcen arbeiten, welche so Objektivität und Vergleichbarkeit gewährleisten sollen. Es werden hierbei ausschließlich Zugriffe auf die entsprechenden Volltexte ausgewertet, keine Aufrufe der Website an sich.

Search the repository


Browse