Topological superconductivity - Spin-polarized currents and Majorana fermions

Date: 21 April 2016

Venue: University of Antwerp - Campus Groenenborger - Room U.247 - Groeneborgerlaan 171 - 2000 Antwerpen

Time: 3:00 PM - 4:00 PM

Organization / co-organization: Condensed Matter Theory

Short description: CMT seminar presented by Kristofer Bjornson (Uppsala University)

We investigate zero-, one-, and two-dimensional configurations of ferromagnetic impurities deposited at the surface of an ordinary s-wave superconductor with Rashba spin-orbit interaction arising from surface effects. The model describes a topological superconductor in one and two dimensions, and in the one-dimensional wire configuration this leads to the appearance of Majorana fermions at the wire endpoints. In particular, we focus on understanding persistent spin-polarized currents that are present in the system, and how these currents can help explain why also the Majorana fermions are spin-polarized.

Kristofer Bjornson, Materials Theory, Uppsala University

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