Aharonov-Bohm and Aharonov-Casher effects in a double quantum dot Josephson junction

Damian Tomaszewski, Piotr Busz, Rosa López, Rok Žitko, Minchul Lee, and Jan Martinek
Phys. Rev. B 98, 174504 – Published 14 November 2018

Abstract

We analyze a Josephson junction between two superconductors interconnected through a normal-state nanostructure made of two parallel nanowires with embedded quantum dots. We study the influence of interference effects due to the Aharonov-Bohm (AB) and Aharonov-Casher (AC) phases for local and nonlocal (split) Cooper pairs. In the AB effect the phase of electron is affected by magnetic flux, while in the AC effect the phase of the electron in solid state can be modified due to the Rashba spin-orbit coupling. In the low-transmission regime the AB and AC effects can be related to only local or nonlocal Cooper pair transport, respectively. We demonstrate that by the addition of the quantum dots the Cooper pair splitting can be made perfectly efficient and that the AC phase is different for non-spin-flip and spin-flip transport processes.

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  • Received 7 August 2018
  • Revised 16 October 2018

DOI:https://doi.org/10.1103/PhysRevB.98.174504

©2018 American Physical Society

Physics Subject Headings (PhySH)

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

Damian Tomaszewski1, Piotr Busz1, Rosa López2, Rok Žitko3,4, Minchul Lee5, and Jan Martinek1

  • 1Institute of Molecular Physics, Polish Academy of Science, Smoluchowskiego 17, 60-179 Poznan, Poland
  • 2Institut de Física Interdisciplinar i de Sistemes Complexos IFISC (CSIC-UIB), E-07122 Palma de Mallorca, Spain
  • 3Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
  • 4Faculty of Mathematics and Physics, University of Ljubljana, Jadranska 19, SI-1000 Ljubljana, Slovenia
  • 5Department of Applied Physics and Institute of Natural Science, College of Applied Science, Kyung Hee University, Yongin 17104, Korea

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Issue

Vol. 98, Iss. 17 — 1 November 2018

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