SKM 2021 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 29: Topological Superconductors

TT 29.1: Vortrag

Freitag, 1. Oktober 2021, 13:30–13:45, H7

Doping a topological insulator: a promising strategy to find topological superconductors? — Sebastian Wolf, Tylor Gardener, and •Stephan Rachel — School of Physics, University of Melbourne, Parkville, VIC 3010, Australia

The search for topological superconductors is one of the most pressing and challenging questions in condensed matter and material research. Despite some early suggestions that doping a topological insulator might be a successful recipe to find topological superconductors, until today there is no general understanding of the relationship of the topology of the superconductor and the topology of its underlying normal state system. One of the major obstacles is the strong effect of the Fermi surface and its subsequent pairing tendencies, usually preventing a detailed comparison between different topological superconducting systems. Here we present an analysis of various doped insulators-topological and trivial–for which the differences of the Fermi surfaces have been removed. Our approach allows us to analyze and compare superconducting instabilities of different insulating normal state systems with identical Fermi surfaces and to present rigorous results on how beneficial it might be to dope a topological insulator.