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TT: Fachverband Tiefe Temperaturen

TT 59: TR: Topological Insulators 2 (jointly with HL and MA)

TT 59.2: Talk

Friday, March 18, 2011, 10:45–11:00, HSZ 03

Transport signatures of Majorana bound states in disordered superconducting nanowires — •Jan Dahlhaus, Michael Wimmer, Fabian Hassler, Anton Akhmerov, and Carlo Beenakker — Instituut-Lorentz, Universiteit Leiden, The Netherlands

Superconducting wires without time-reversal and spin-rotation symmetries can be driven into a topological phase that supports Majorana bound states. We show that the phase transition is signaled by a quantized thermal conductance and electrical shot noise power, irrespective of disorder. In a ring geometry, it is signaled by a period doubling of the magnetoconductance oscillations. Furthermore the influence on the Andreev reflection process at the Fermi level is addressed.