Dresden 2014 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 75: Transport: Majorana fermions (organized by TT)
HL 75.7: Vortrag
Mittwoch, 2. April 2014, 17:00–17:15, HSZ 03
Disordered one-dimensional topological superconductors — •Michael Wimmer1,2, Inanc Adagideli3, and Aykut Teker3 — 1Universiteit Leiden, The Netherlands — 2TU Delft, The Netherlands — 3Sabanci University, Istanbul, Turkey
It is well-established that disorder is harmful to a topological phase in p-wave superconductors [1]. Recently, it has been proposed to engineer ap-wave superconductor using conventional materials: a nanowire with strong spin-obrit coupling in proximity to a s-wave superconductor and in a magnetic field ("s-wave Rashba wires"), and first experimental results have been obtained [2].
We present a simple and intuitive method to link topological
properties of superconducting wires to their normal state properties. This allows to describe ensemble-averaged topological properties as well as individual systems. In particular, we show that the effect of disorder is quite different in p-wave superconductors and s-wave Rahsba
wires: While disorder is always harmful for the former, topology can be created by disorder in the latter [3].
P. Brouwer et al. Phys. Rev. B 84, 144526 (2011)
V. Mourik et al. Science 336, 1003 (2012)
I. Adagideli, M. Wimmer, A. Teker. arXiv:1302.2612 (2013)