%0 Journal Article
%A Kölzer, Jonas
%A Rosenbach, Daniel
%A Weyrich, Christian
%A Schmitt, Tobias W
%A Schleenvoigt, Michael
%A Jalil, Abdur Rehman
%A Schüffelgen, Peter
%A Mussler, Gregor
%A Sacksteder IV, Vincent E
%A Grützmacher, Detlev
%A Lüth, Hans
%A Schäpers, Thomas
%T Phase-coherent loops in selectively-grown topological insulator nanoribbons
%J Nanotechnology
%V 31
%N 32
%@ 1361-6528
%C Bristol
%I IOP Publ.
%M FZJ-2020-02056
%P 325001 -
%D 2020
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%$ pmid:32294631
%U <Go to ISI:>//WOS:000536929600001
%R 10.1088/1361-6528/ab898a
%U https://juser.fz-juelich.de/record/877229