Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

dc.contributor.author

Wei, MT

dc.contributor.author

Draelos, AW

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Seredinski, A

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Ke, CT

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Li, H

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Mehta, Y

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Watanabe, K

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Taniguchi, T

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Yamamoto, M

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Tarucha, S

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Finkelstein, G

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Amet, F

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Borzenets, IV

dc.date.accessioned

2019-12-22T00:47:04Z

dc.date.available

2019-12-22T00:47:04Z

dc.date.issued

2019-09-10

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2019-12-22T00:47:00Z

dc.description.abstract

© 2019 American Physical Society. We study a two-terminal graphene Josephson junction with contacts shaped to form a narrow constriction, less than 100nm in length. The contacts are made from type-II superconducting contacts and able to withstand magnetic fields high enough to reach the quantum Hall regime in graphene. In this regime, the device conductance is determined by edge states, plus the contribution from the constricted region. In particular, the constriction area can support supercurrents up to fields of ∼2.5T. Additionally, enhanced conductance is observed through a wide range of magnetic fields and gate voltages. This additional conductance and the appearance of supercurrent is attributed to the tunneling between counterpropagating quantum Hall edge states along opposite superconducting contacts.

dc.identifier.issn

2469-9950

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2469-9969

dc.identifier.uri

https://hdl.handle.net/10161/19633

dc.language

en

dc.publisher

American Physical Society (APS)

dc.relation.ispartof

Physical Review B

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10.1103/PhysRevB.100.121403

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Science & Technology

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Technology

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Physical Sciences

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Materials Science, Multidisciplinary

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Physics, Applied

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Physics, Condensed Matter

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Materials Science

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Physics

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JOSEPHSON-JUNCTIONS

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GRAPHENE

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SUPERCURRENT

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Chiral quasiparticle tunneling between quantum Hall edges in proximity with a superconductor

dc.type

Journal article

duke.contributor.orcid

Draelos, AW|0000-0002-9046-3193

duke.contributor.orcid

Finkelstein, G|0000-0002-0883-0741

pubs.issue

12

pubs.organisational-group

Staff

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Duke

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Physics

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Trinity College of Arts & Sciences

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Duke Institute for Brain Sciences

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University Institutes and Centers

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Institutes and Provost's Academic Units

pubs.publication-status

Published

pubs.volume

100

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