Philipp Rüßmann^1,2*, Stefan Blügel^2*

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

2 Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich, Germany

* Corresponding authors emails: p.ruessmann@fz-juelich.de, s.bluegel@fz-juelich.de

DOI10.24435/materialscloud:et-g4 [version v1]

Publication date: Sep 27, 2022

How to cite this record

Philipp Rüßmann, Stefan Blügel, Dataset of proximity induced superconductivity in a topological insulator, Materials Cloud Archive 2022.123 (2022), doi: 10.24435/materialscloud:et-g4.

Description

Interfacing a topological insulator (TI) with an s-wave superconductor (SC) is a promising material platform that offers the possibility to realize a topological superconductor through which Majorana-based topologically protected qubits can be engineered. In our computational study of the prototypical SC/TI interface between Nb and Bi₂Te₃, we identify the benefits and possible bottlenecks of this potential Majorana material platform. Bringing Nb in contact with the TI film induces charge doping from the SC to the TI, which shifts the Fermi level into the TI conduction band. For thick TI films, this results in band bending leading to the population of trivial TI quantum-well states at the interface. In the superconducting state, we uncover that the topological surface state experiences a sizable superconducting gap-opening at the SC/TI interface, which is furthermore robust against fluctuations of the Fermi energy. We also show that the trivial interface state is only marginally proximitized, potentially obstructing the realization of Majorana-based qubits in this material platform. This dataset contains the data for the DFT-based calculations for interfaces between the s-wave superconductor Nb and the topological insulator Bi₂Te₃ which is discussed in the publication referenced below.

Materials Cloud sections using this data

Files

File name	Size	Description
README.md MD5md5:fb253ea3944777b9228314d02012bb11	3.9 KiB	Description of the dataset
env.txt MD5md5:02cb53908cc540f5abf1be36f2fdf57c	3.4 KiB	Exported python environment
figure_creation.zip MD5md5:5344f97585f094669cd007d1e139e7df	16.8 KiB	Scripts for data analysis and plotting
data_Bi2Te3_Nb.aiida MD5md5:2d316bba4611d55e2a42a7f56bbd398b Open this AiiDA archive on renkulab.io (https://renkulab.io/)	16.7 GiB	AiiDA export file for this dataset

License

Files and data are licensed under the terms of the following license: Creative Commons Attribution 4.0 International.
Metadata, except for email addresses, are licensed under the Creative Commons Attribution Share-Alike 4.0 International license.

External references

Keywords

density-functional theory superconductivity Bogoliubov-de Gennes topological materials topological superconductor