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Proceedings Paper

Stabilization and control of Majorana bound states with skyrmions (Conference Presentation)
Author(s): Alexey Kovalev

Paper Abstract

Majorana bound states (MBSs) are a promising candidate for a realization of topological quantum computer and memory, which uses non-Abelian anyons to encode and manipulate quantum information. Since Kitaev's toy model for creating MBSs using the unpaired sites at the ends of a spinless p-wave superconducting wire, it has been shown that a conventional s-wave superconductor with spin-orbit coupling (SOC) subject to Zeeman or proximity-induced exchange field has effective p-wave pairing and thus can also support these nonlocal quasiparticles. In systems lacking an extrinsic SOC, an effective SOC can be provided through a nonuniform magnetic texture or field. Here, we explore stabilization of MBSs through a proximity effect with a noncollinear ferromagnet supporting skyrmions. Skyrmions can be easily manipulated via currents or temperature gradients thus providing means for braiding and manipulation of MBSs. In particular, we demonstrate how a nonabelian statistics of MBSs can be revealed by moving proximity coupled skyrmions in a vicinity of a tri-junction with different superconducting phases.

Paper Details

Date Published: 29 September 2017
Proc. SPIE 10357, Spintronics X, 103572O (29 September 2017); doi: 10.1117/12.2275060
Show Author Affiliations
Alexey Kovalev, Univ. of Nebraska-Lincoln (United States)

Published in SPIE Proceedings Vol. 10357:
Spintronics X
Henri-Jean Drouhin; Jean-Eric Wegrowe; Manijeh Razeghi; Henri Jaffrès, Editor(s)

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