Manipulating Majorana fermions using supercurrents

Romito, Alessandro and Alicea, Jason and Refael, Gil and Von Oppen, Felix (2012) Manipulating Majorana fermions using supercurrents. Physical Review B - Condensed Matter and Materials Physics, 85 (2). ISSN 1098-0121

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Topological insulator edges and spin-orbit-coupled quantum wires in proximity to s-wave superconductors can be tuned through a topological quantum phase transition by a Zeeman field. Here we show that a supercurrent flowing in the s-wave superconductor also drives such a transition. We propose to use this mechanism to generate and manipulate Majorana fermions that localize at domain walls between topological and nontopological regions of an edge or wire. In quantum wires, this method carries the added benefit that a supercurrent reduces the critical Zeeman field at which the topological phase appears.

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Journal Article
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Physical Review B - Condensed Matter and Materials Physics
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02 Dec 2019 13:50
Last Modified:
22 Nov 2022 08:27