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Josephson Diode Effect in Supercurrent Interferometers

Souto, Rubén Seoane LU orcid ; Leijnse, Martin LU and Schrade, Constantin (2022) In Physical Review Letters 129(26).
Abstract

A Josephson diode is a nonreciprocal circuit element that supports a larger dissipationless supercurrent in one direction than in the other. In this Letter, we propose a class of Josephson diodes based on supercurrent interferometers composed of Andreev bound state Josephson junctions or interacting quantum dot Josephson junctions, which are not diodes themselves but possess nonsinusoidal current-phase relations. We show that such Josephson diodes have several important advantages, like being electrically tunable and requiring only time-reversal breaking by a magnetic flux. We also show that our diodes have a characteristic ac response, revealed by the Shapiro steps. Even the simplest realization of our Josephson diode paradigm that... (More)

A Josephson diode is a nonreciprocal circuit element that supports a larger dissipationless supercurrent in one direction than in the other. In this Letter, we propose a class of Josephson diodes based on supercurrent interferometers composed of Andreev bound state Josephson junctions or interacting quantum dot Josephson junctions, which are not diodes themselves but possess nonsinusoidal current-phase relations. We show that such Josephson diodes have several important advantages, like being electrically tunable and requiring only time-reversal breaking by a magnetic flux. We also show that our diodes have a characteristic ac response, revealed by the Shapiro steps. Even the simplest realization of our Josephson diode paradigm that relies on only two junctions can achieve efficiencies of up to ∼40% and, interestingly, far greater efficiencies are achievable by concatenating interferometer loops. We hope that our Letter will stimulate the search for highly tunable Josephson diode effects in Josephson devices based semiconductor-superconductor hybrids, 2d materials, and topological insulators, where nonsinusoidal current-phase relations were recently observed.

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Please use this url to cite or link to this publication:
author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
129
issue
26
article number
267702
publisher
American Physical Society
external identifiers
  • pmid:36608204
  • scopus:85144614520
ISSN
0031-9007
DOI
10.1103/PhysRevLett.129.267702
language
English
LU publication?
yes
id
93366f53-e4f9-4222-911b-33e35bfc3e24
date added to LUP
2023-01-05 11:54:24
date last changed
2025-02-07 23:26:49
@article{93366f53-e4f9-4222-911b-33e35bfc3e24,
  abstract     = {{<p>A Josephson diode is a nonreciprocal circuit element that supports a larger dissipationless supercurrent in one direction than in the other. In this Letter, we propose a class of Josephson diodes based on supercurrent interferometers composed of Andreev bound state Josephson junctions or interacting quantum dot Josephson junctions, which are not diodes themselves but possess nonsinusoidal current-phase relations. We show that such Josephson diodes have several important advantages, like being electrically tunable and requiring only time-reversal breaking by a magnetic flux. We also show that our diodes have a characteristic ac response, revealed by the Shapiro steps. Even the simplest realization of our Josephson diode paradigm that relies on only two junctions can achieve efficiencies of up to ∼40% and, interestingly, far greater efficiencies are achievable by concatenating interferometer loops. We hope that our Letter will stimulate the search for highly tunable Josephson diode effects in Josephson devices based semiconductor-superconductor hybrids, 2d materials, and topological insulators, where nonsinusoidal current-phase relations were recently observed.</p>}},
  author       = {{Souto, Rubén Seoane and Leijnse, Martin and Schrade, Constantin}},
  issn         = {{0031-9007}},
  language     = {{eng}},
  month        = {{12}},
  number       = {{26}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review Letters}},
  title        = {{Josephson Diode Effect in Supercurrent Interferometers}},
  url          = {{http://dx.doi.org/10.1103/PhysRevLett.129.267702}},
  doi          = {{10.1103/PhysRevLett.129.267702}},
  volume       = {{129}},
  year         = {{2022}},
}