Nonequilibrium charge dynamics in Majorana-Josephson devices

Ian J. van Beek, Alfredo Levy Yeyati, and Bernd Braunecker
Phys. Rev. B 98, 224502 – Published 7 December 2018

Abstract

We investigate the impact of introducing Majorana bound states, formed by a proximitized semiconducting nanowire in the topological regime, into a current biased capacitive Josephson junction, thereby adding delocalized states below the superconducting gap. We find that this qualitatively changes the charge dynamics of the system, diminishing the role of Bloch oscillations and causing single-particle tunneling effects to dominate. We fully characterize the resulting charge dynamics and the associated voltage and current signals. Our work reveals a rich landscape of behaviors in both the static and time-varying driving modes. This can be directly attributed to the presence of Majorana bound states, which serve as a pathway for charge transport and enable nonequilibrium excitations of the Majorana-Josephson device.

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  • Received 17 September 2018

DOI:https://doi.org/10.1103/PhysRevB.98.224502

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Ian J. van Beek1, Alfredo Levy Yeyati2, and Bernd Braunecker1

  • 1SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews KY16 9SS, United Kingdom
  • 2Departamento de Física Teórica de la Materia Condensada, Condensed Matter Physics Center (IFIMAC) and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, 28049 Madrid, Spain

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Vol. 98, Iss. 22 — 1 December 2018

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