Kevin Janßen^1,2,3, Philipp Rüßmann^4,5*, Sergej Liberda^1,3, Michael Schleenvoigt^1,3, Xiao Hou¹, Abdur Rehman Jalil^1,3, Florian Lentz⁶, Stefan Trellenkamp⁶, Benjamin Bennemann^1,3, Erik Zimmermann^1,3, Gregor Mussler^1,3, Peter Schüffelgen^1,3, Claus-Michael Schneider², Stefan Blügel⁵, Detlev Grützmacher^1,3, Lukasz Plucinski², Thomas Schäpers^1,3

1 Peter Grünberg Insitute 9, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany

2 Peter Grünberg Insitute 6, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany

3 JARA-Fundamentals of Future Information Technology, Jülich-Aachen Research Alliance, Forschungszentrum Jülich GmbH and RWTH Aachen University, Germany

4 Institute of Theoretical Physics and Astrophysics, University of Würzburg, D-97074, Germany

5 Peter Grünberg Institut and Institute for Advanced Simulation (PGI-1/IAS-1), Forschungszentrum Jülich and JARA, D-52425 Jülich

6 Helmholtz Nano Facility, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany

* Corresponding authors emails: philipp.ruessmann@uni-wuerzburg.de

DOI10.24435/materialscloud:p4-0v [version v3]

Publication date: Feb 15, 2024

How to cite this record

Kevin Janßen, Philipp Rüßmann, Sergej Liberda, Michael Schleenvoigt, Xiao Hou, Abdur Rehman Jalil, Florian Lentz, Stefan Trellenkamp, Benjamin Bennemann, Erik Zimmermann, Gregor Mussler, Peter Schüffelgen, Claus-Michael Schneider, Stefan Blügel, Detlev Grützmacher, Lukasz Plucinski, Thomas Schäpers, Characterization of single in situ prepared interfaces composed of niobium and a selectively-grown (Bi_1-xSb_x)₂Te₃ topological insulator nanoribbon, Materials Cloud Archive 2024.29 (2024), https://doi.org/10.24435/materialscloud:p4-0v

Description

With increasing interest 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/(Bi_0.15Sb_0.85)₂Te₃ 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. This dataset contains the DFT and experimental raw data discussed in the associated publication.

Materials Cloud sections using this data

Files

File name	Size	Description
README.md MD5md5:b743a89366c82b42cab2b8685e9ebae7	3.0 KiB	Description of the dataset
Raw_Data_Experiment.zip MD5md5:e9f663ddc4e583959fc2505773b4351c	16.6 MiB	Compressed zip file for the raw experimental data
export.aiida MD5md5:2ca5232fc4b6e46adaa6ef53ea362632 Open this AiiDA archive on renkulab.io (https://renkulab.io/)	135.7 MiB	AiiDA export file for the KS-BdG simulations of this work
denvis.zip MD5md5:c773c6a24230f23eabb61facbaf2b51f	83.7 MiB	Raw data for density visualisation of Figs. 5a and S9b,d

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External references

Keywords

superconductivity topological materials topological superconductor Majorana transport experiment density-functional theory