TY  - JOUR
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  - Characterization of single in situ prepared interfaces composed of niobium and a selectively grown ( Bi 1 − x Sb x ) 2 Te 3 topological insulator nanoribbon
JO  - Physical review materials
VL  - 8
IS  - 3
SN  - 2475-9953
CY  - College Park, MD
PB  - APS
M1  - FZJ-2024-02064
SP  - 034205
PY  - 2024
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 an 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 fabrication process, combining selective area growth and shadow evaporation which allows the characterization of a single in situ fabricated Nb/(Bi0.15Sb0.85)2Te3 nanointerface. 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 peaklike shape of our differential conductance spectra and the origin of the observed smearing of conductance features.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:001195873700004
DO  - DOI:10.1103/PhysRevMaterials.8.034205
UR  - https://juser.fz-juelich.de/record/1024257
ER  -