We study the equilibrium dc Josephson current in a junction between an s-wave and a topological superconductor. Cooper pairs from the s-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode localized near the junction or via the above-gap continuum states. We find that theMajorana contribution to the supercurrent can be switched on when time-reversal symmetry in the conventional lead is broken, e.g., by an externally applied magnetic field inducing a Zeeman splitting. Moreover, if the magnetic field has a component in the direction of the effective spin-orbit field, there will be a Majorana-induced anomalous supercurrent at zero phase difference. These behaviors may serve as a signature characteristic of Majorana zero modes and are accessible to devices with only superconducting contacts.

Josephson current via an isolated Majorana zero mode / Liu, Cx; van Heck, B; Wimmer, M. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 103:1(2021). [10.1103/PhysRevB.103.014510]

Josephson current via an isolated Majorana zero mode

van Heck, B
Penultimo
;
2021

Abstract

We study the equilibrium dc Josephson current in a junction between an s-wave and a topological superconductor. Cooper pairs from the s-wave superconducting lead can transfer to the topological side either via an unpaired Majorana zero mode localized near the junction or via the above-gap continuum states. We find that theMajorana contribution to the supercurrent can be switched on when time-reversal symmetry in the conventional lead is broken, e.g., by an externally applied magnetic field inducing a Zeeman splitting. Moreover, if the magnetic field has a component in the direction of the effective spin-orbit field, there will be a Majorana-induced anomalous supercurrent at zero phase difference. These behaviors may serve as a signature characteristic of Majorana zero modes and are accessible to devices with only superconducting contacts.
2021
Josephson;Majorana;tunneling
01 Pubblicazione su rivista::01a Articolo in rivista
Josephson current via an isolated Majorana zero mode / Liu, Cx; van Heck, B; Wimmer, M. - In: PHYSICAL REVIEW. B. - ISSN 2469-9950. - 103:1(2021). [10.1103/PhysRevB.103.014510]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1656007
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