%0 Journal Article
%A Leis, Arthur
%A Schleenvoigt, Michael
%A Cherepanov, Vasily
%A Lüpke, Felix
%A Schüffelgen, Peter
%A Mussler, Gregor
%A Grützmacher, Detlev
%A Voigtländer, Bert
%A Tautz, F. Stefan
%T Front Cover: Lifting the Spin‐Momentum Locking in Ultra‐Thin Topological Insulator Films (Adv. Quantum Technol. 11/2021)
%J Advanced quantum technologies
%V 4
%N 11
%@ 2511-9044
%C Weinheim
%I Wiley-VCH Verlag
%M FZJ-2021-04418
%P 2170111 -
%D 2021
%X In article number 2100083, Arthur Leis, Bert Voigtländer and co-workers demonstrate nanoscale four-probe measurements on atomically thin topological insulator films. For this purpose, four individual scanning tunneling microscope tips are directly contacting individual terraces on the sample surface to quantify the thickness-dependent film conductivity. This enables the authors to detect a breakdown of spin-momentum locking in the topological surface state as a function of the film thickness. In the few-layer limit, this effect can realize helical edge modes along step edges with potential applications in spintronics and quantum computing.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1002/qute.202170111
%U https://juser.fz-juelich.de/record/902623