Publication: Manipulation of Majorana bound states in proximity to a quantum ring with Rashba coupling
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Publication Date
2022-01-12
Authors
Medina, Fabián Gonzalo
Martínez, Dunkan
Rosales, Luis
Orellana, Pedro A.
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Nature Portfolio
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Abstract
The quest for Majorana zero modes in the laboratory is an active field of research in condensed matter physics. In this regard, there have been many theoretical proposals; however, their experimental detection remains elusive. In this article, we present a realistic setting by considering a quantum ring with Rashba spin-orbit coupling and threaded by a magnetic flux, in contact with a topological superconducting nanowire. We focus on spin-polarized persistent currents to assess the existence of Majorana zero modes. We find that the Rashba spin-orbit coupling allows for tuning the position of the zero energy crossings in the flux parameter space and has sizable effects on spin-polarized persistent currents. We believe that our results will contribute towards probing the existence of Majorana zero modes.
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© The Author(s) 2022
F.G.M. is grateful for the funding of scholarship CONICYT-Chile No. 21170550. L.R. and P.A.O. acknowledges
support from FONDECYT, Grants 1180914 and 1201876. Work at Madrid has been supported by Agencia Estatal
de Investigación, Grant PID2019-106820RB-C21.