Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction

Here, the authors perform measurements of the interference effects of Cooper Quartets (CQ), observed in a multi-terminal graphene Josephson junction where two terminals are tied by a flux loop. By biasing the superconducting contacts, they identify a superconducting branch attributed to CQ currents,...

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Main Authors: Ko-Fan Huang, Yuval Ronen, Régis Mélin, Denis Feinberg, Kenji Watanabe, Takashi Taniguchi, Philip Kim
Format: Article
Language:English
Published: Nature Portfolio 2022-05-01
Series:Nature Communications
Online Access:https://doi.org/10.1038/s41467-022-30732-7
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author Ko-Fan Huang
Yuval Ronen
Régis Mélin
Denis Feinberg
Kenji Watanabe
Takashi Taniguchi
Philip Kim
author_facet Ko-Fan Huang
Yuval Ronen
Régis Mélin
Denis Feinberg
Kenji Watanabe
Takashi Taniguchi
Philip Kim
author_sort Ko-Fan Huang
collection DOAJ
description Here, the authors perform measurements of the interference effects of Cooper Quartets (CQ), observed in a multi-terminal graphene Josephson junction where two terminals are tied by a flux loop. By biasing the superconducting contacts, they identify a superconducting branch attributed to CQ currents, and present evidence for interference between different CQ processes.
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spelling doaj.art-e7498c6385694e3799de421b07f106f32022-12-22T02:31:44ZengNature PortfolioNature Communications2041-17232022-05-011311910.1038/s41467-022-30732-7Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junctionKo-Fan Huang0Yuval Ronen1Régis Mélin2Denis Feinberg3Kenji Watanabe4Takashi Taniguchi5Philip Kim6Department of Physics, Harvard UniversityDepartment of Physics, Harvard UniversityUniversité Grenoble—Alpes, CNRS, Grenoble INP, Institut NEELUniversité Grenoble—Alpes, CNRS, Grenoble INP, Institut NEELResearch Center for Functional Materials, National Institute for Materials ScienceInternational Center for Materials Nanoarchitectonics, National Institute for Materials ScienceDepartment of Physics, Harvard UniversityHere, the authors perform measurements of the interference effects of Cooper Quartets (CQ), observed in a multi-terminal graphene Josephson junction where two terminals are tied by a flux loop. By biasing the superconducting contacts, they identify a superconducting branch attributed to CQ currents, and present evidence for interference between different CQ processes.https://doi.org/10.1038/s41467-022-30732-7
spellingShingle Ko-Fan Huang
Yuval Ronen
Régis Mélin
Denis Feinberg
Kenji Watanabe
Takashi Taniguchi
Philip Kim
Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
Nature Communications
title Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
title_full Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
title_fullStr Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
title_full_unstemmed Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
title_short Evidence for 4e charge of Cooper quartets in a biased multi-terminal graphene-based Josephson junction
title_sort evidence for 4e charge of cooper quartets in a biased multi terminal graphene based josephson junction
url https://doi.org/10.1038/s41467-022-30732-7
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