TY  - JOUR
AU  - Kölzer, Jonas
AU  - Rosenbach, Daniel
AU  - Weyrich, Christian
AU  - Schmitt, Tobias W
AU  - Schleenvoigt, Michael
AU  - Jalil, Abdur Rehman
AU  - Schüffelgen, Peter
AU  - Mussler, Gregor
AU  - Sacksteder IV, Vincent E
AU  - Grützmacher, Detlev
AU  - Lüth, Hans
AU  - Schäpers, Thomas
TI  - Phase-coherent loops in selectively-grown topological insulator nanoribbons
JO  - Nanotechnology
VL  - 31
IS  - 32
SN  - 1361-6528
CY  - Bristol
PB  - IOP Publ.
M1  - FZJ-2020-02056
SP  - 325001 -
PY  - 2020
AB  - We succeeded in the fabrication of topological insulator (Bi0.57Sb0.43)2Te3 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.
LB  - PUB:(DE-HGF)16
C6  - pmid:32294631
UR  - <Go to ISI:>//WOS:000536929600001
DO  - DOI:10.1088/1361-6528/ab898a
UR  - https://juser.fz-juelich.de/record/877229
ER  -