TY  - EJOUR
AU  - Janßen, Kevin
AU  - Rüßmann, Philipp
AU  - Liberda, Sergej
AU  - Schleenvoigt, Michael
AU  - Hou, Xiao
AU  - Jalil, Abdur Rehman
AU  - Lentz, Florian
AU  - Trellenkamp, Stefan
AU  - Bennemann, Benjamin
AU  - Zimmermann, Erik
AU  - Mussler, Gregor
AU  - Schüffelgen, Peter
AU  - Schneider, Claus-Michael
AU  - Blügel, Stefan
AU  - Grützmacher, Detlev
AU  - Plucinski, Lukasz
AU  - Schäpers, Thomas
TI  - Single in situ Interface Characterization Composed of Niobium and a Selectively Grown (Bi$_{1-x}$Sb$_x$)$_2$Te$_3$ Topological Insulator Nanoribbon
PB  - arXiv
M1  - FZJ-2023-05763
PY  - 2023
AB  - With increasing attention in Majorana physics for possible quantum bit applications, a large interest has been developed to understand the properties of the interface between a $s$-type superconductor and a topological insulator. Up to this point the interface analysis was mainly focused on in situ prepared Josephson junctions, which consist of two coupled single interfaces or to ex-situ fabricated single interface devices. In our work we utilize a novel fabrication process, combining selective area growth and shadow evaporation which allows the characterization of a single in situ fabricated Nb/$\mathrm{(Bi_{0.15}Sb_{0.85})_2Te_3}$ nano interface. The resulting high interface transparency is apparent by a zero bias conductance increase by a factor of 1.7. Furthermore, we present a comprehensive differential conductance analysis of our single in situ interface for various magnetic fields, temperatures and gate voltages. Additionally, density functional theory calculations of the superconductor/topological insulator interface are performed in order to explain the peak-like shape of our differential conductance spectra and the origin of the observed smearing of conductance features.
KW  - Mesoscale and Nanoscale Physics (cond-mat.mes-hall) (Other)
KW  - FOS: Physical sciences (Other)
LB  - PUB:(DE-HGF)25
DO  - DOI:10.48550/ARXIV.2312.07325
UR  - https://juser.fz-juelich.de/record/1019942
ER  -