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Dresden 2014 – wissenschaftliches Programm

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TT: Fachverband Tiefe Temperaturen

TT 101: Transport - Poster Session

TT 101.42: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Majorana fermions at the quantum spin Hall edgeShuo Mi1, Dimitry Pikulin1, •Michael Wimmer1,2, and Carlo Beenakker11Universiteit Leiden, The Netherlands — 2TU Delft, The Netherlands

One of the earliest proposals for Majorana fermions in condensed matter systems involves quantum spin Hall (QSH) insulators [1]. In fact, Majorana fermions appear naturally if QSH insulators are coupled to superconductors, and are in this setting also inherently more stable than for example the now very popular proposal of obtaining Majorana fermions in semiconducting nanowires.

Yet, the proposals for Majorana fermions in QSH always involved elements (magnetic insulators, or very strong magnetic fields) that pose experimental problems. Here, we present a much simpler setup involving only gates and a weak magnetic field that will allow for an unambiguous signature of Majorana fermions in this system. In addition, we explain how to prove the non-Abelian statistics in a QSH setup [2].
L. Fu & C. Kane. Phys. Rev. B 79, 161408(R) (2009)
S. Mi et al. Phys. Rev. B 87, 241405(R) (2013)

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