Josephson tunnel junction arrays and Andreev weak links: what’s the difference?

A. Mert Bozkurt, Valla Fatemi

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


Josephson elements are cornerstones of cryogenic classical and quantum superconducting technology, owing to their nonlinearity. Two important types of Josephson elements are often considered distinct: the tunnel junction (superconductor-insulator-superconductor, SIS) and the normal weak link (superconductor-normal-superconductor, SNS) referring to any non-superconducting and non-insulating central region. SNS junctions and SIS junctions have appeared in related technological and basic science contexts over the last decade. In this perspective article, we review correspondences between SISIS junctions and SNS junctions in limiting regimes, in which a single, general energy-phase relationship describes the systems. We show how this insight helped to connect recent bodies of theoretical and experimental work in both systems. We conclude by describing a few important differences that also impact their use in applied contexts.

Original languageEnglish
Title of host publicationSpintronics XVI
EditorsJean-Eric Wegrowe, Joseph S. Friedman, Manijeh Razeghi
ISBN (Electronic)9781510665262
Publication statusPublished - 2023
EventSpintronics XVI 2023 - San Diego, United States
Duration: 20 Aug 202324 Aug 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceSpintronics XVI 2023
Country/TerritoryUnited States
CitySan Diego


  • Josephson junctions
  • mesoscopic physics
  • quantum information devices
  • superconductivity


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