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TT: Fachverband Tiefe Temperaturen
TT 19: Topological Superconductors
TT 19.5: Vortrag
Mittwoch, 7. September 2022, 12:45–13:00, H23
Density functional Bogoliubov - de Gennes calculations for a topological superconductor — •Philipp Rüßmann1,2 and Stefan Blügel2 — 1Institute of Theoretical Physics and Astrophysics, University of Würzburg, Würzburg, Germany — 2Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, Jülich, Germany
The possibility to combine topological electronic band structures and superconductivity (SC) opens new pathways towards engineering exotic quantum matter. Proximity induced superconductivity in the topological surface state of topological insulators (TIs) offers the possibility to realize a chiral p-wave superconductor. Such a superconductor is an exotic state of matter which supports non-Abelian anyons and is of great interest for Majorana-based quantum computing applications. Material-specific insights into the microscopic details of such SC/TI interfaces are of great interest and an indispensable ingredient in the challenging materials optimization problem.
Here we first introduce the recent Bogoliubov de-Gennes (BdG) extension to the all electron full potential relativistic Korringa-Kohn-Rostoker (KKR) Green function code JuKKR [1]. We apply the KKR-BdG method to the s-wave superconductor Nb [2] and investigate the proximity induced superconductivity in the topological surface state of a SC/TI heterostructure.
[1] https://jukkr.fz-juelich.de
[2] PRB 105, 125143 (2022)