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Dresden 2014 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 101: Theoretical advances in interacting topological phases (organized by TT)

HL 101.6: Talk

Thursday, April 3, 2014, 17:45–18:05, HSZ 03

Non-Abelian quasiparticles in strongly interacting helical liquids — •Thomas Schmidt, Christoph Orth, and Rakesh Tiwari — Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland

The interplay of strong Coulomb interactions with Rashba spin-orbit coupling can lead to the opening of a gap in the edge spectrum of a two-dimensional topological insulator, even if the system Hamiltonian is time-reversal invariant. We investigate the properties of such a strongly interacting helical system in proximity to an s-wave superconductor. We show that the interface between a region gapped out by the proximity effect and a region gapped out by strong interactions can host non-Abelian bound states, and determine their exchange statistics.

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