In:
Nanotechnology, IOP Publishing, Vol. 31, No. 32 ( 2020-08-07), p. 325001-
Kurzfassung:
We succeeded in the fabrication of topological insulator (Bi 0.57 Sb 0.43 ) 2 Te 3 Hall bars as well as nanoribbons by means of selective-area growth using molecular beam epitaxy. By performing magnetotransport measurements at low temperatures information on the phase-coherence of the electrons is gained by analyzing the weak-antilocalization effect. Furthermore, from measurements on nanoribbons at different magnetic field tilt angles an angular dependence of the phase-coherence length is extracted, which is attributed to transport anisotropy and geometrical factors. For the nanoribbon structures universal conductance fluctuations were observed. By performing a Fourier transform of the fluctuation pattern a series of distinct phase-coherent closed-loop trajectories are identified. The corresponding enclosed areas can be explained in terms of nanoribbon dimensions and phase-coherence length. In addition, from measurements at different magnetic field tilt angles we can deduce that the area enclosed by the loops are predominately oriented parallel to the quintuple layers.
Materialart:
Online-Ressource
ISSN:
0957-4484
,
1361-6528
DOI:
10.1088/1361-6528/ab898a
Sprache:
Unbekannt
Verlag:
IOP Publishing
Publikationsdatum:
2020
ZDB Id:
1362365-5
SSG:
11
