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HL: Fachverband Halbleiterphysik

HL 76: Topological Insulators II (joined session with TT)

HL 76.2: Vortrag

Donnerstag, 23. März 2017, 15:00–15:15, POT 251

Investigation of topological states in proximitized superconducting 2d materials — •Petra Högl, Denis Kochan, Tobias Frank, Martin Gmitra, and Jaroslav Fabian — Insitute for Theoretical Physics, University of Regensburg, 93040 Regensburg, Germany

Recently, the appearance of helical edge states in graphene in transition-metal dichalcogenides has been predicted [1]. The presence of these quantum spin Hall states is a precursor for topological insulators. We theoretically investigate such 2d systems proximitized to a s-wave superconductor. As predicted by Fu and Kane [2] the combination of 2d topological insulators and superconductors can lead to the formation of Majorana states. This work has been supported by the Int. Doctorate Program Topological Insulators of the Elite Network of Bavaria, DFG SFB 689, GRK 1570, and by the EU Seventh Framework Programme under Grant Agreement No. 604391 Graphene Flagship.

[1] M. Gmitra, D. Kochan, P. Högl, J. Fabian, Phys. Rev. B 93, 155104 (2016)

[2] L. Fu and C. L. Kane, Phys. Rev. B 79, 161408(R) (2009)