Observation of Supercurrent Enhancement in SNS Junctions by Nonequilibrium Injection into Supercurrent Carrying Bound Andreev States

Jonatan Kutchinsky; Rafael Taboryski; Claus B. Sørensen; Jørn Bindslev Hansen; Poul Erik Lindelof

doi:10.1103/PhysRevLett.83.4856

Observation of Supercurrent Enhancement in SNS Junctions by Nonequilibrium Injection into Supercurrent Carrying Bound Andreev States

Jonatan Kutchinsky, Rafael Taboryski, Claus B. Sørensen, Jørn Bindslev Hansen, Poul Erik Lindelof

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Abstract

We report for the first time enhancement of the supercurrent by means of injection in a mesoscopic three terminal planar SN-SNS device made of Al on GaAs. When a current is injected from one of the superconducting Al electrodes at an injection bias V = Δ(T)/e, the dc Josephson current between the other two superconducting electrodes has a maximum, giving evidence for an enhancement due to a nonequilibrium injection into bound Andreev states of the underlying semiconductor. The effect persists to temperatures where the equilibrium supercurrent has vanished.

Original language	English
Journal	Physical Review Letters
Volume	83
Issue number	23
Pages (from-to)	4856-4859
ISSN	0031-9007
DOIs	https://doi.org/10.1103/PhysRevLett.83.4856
Publication status	Published - 1999

Bibliographical note

Copyright (1999) by the American Physical Society.

Keywords

ENERGY-GAP STRUCTURE
SUPERCONDUCTING WEAK LINKS
REFLECTIONS
TRANSISTOR

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title = "Observation of Supercurrent Enhancement in SNS Junctions by Nonequilibrium Injection into Supercurrent Carrying Bound Andreev States",

abstract = "We report for the first time enhancement of the supercurrent by means of injection in a mesoscopic three terminal planar SN-SNS device made of Al on GaAs. When a current is injected from one of the superconducting Al electrodes at an injection bias V = Δ(T)/e, the dc Josephson current between the other two superconducting electrodes has a maximum, giving evidence for an enhancement due to a nonequilibrium injection into bound Andreev states of the underlying semiconductor. The effect persists to temperatures where the equilibrium supercurrent has vanished.",

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author = "Jonatan Kutchinsky and Rafael Taboryski and S{\o}rensen, {Claus B.} and Hansen, {J{\o}rn Bindslev} and Lindelof, {Poul Erik}",

note = "Copyright (1999) by the American Physical Society.",

year = "1999",

doi = "10.1103/PhysRevLett.83.4856",

language = "English",

volume = "83",

pages = "4856--4859",

journal = "Physical Review Letters",

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T1 - Observation of Supercurrent Enhancement in SNS Junctions by Nonequilibrium Injection into Supercurrent Carrying Bound Andreev States

AU - Kutchinsky, Jonatan

AU - Taboryski, Rafael

AU - Sørensen, Claus B.

AU - Hansen, Jørn Bindslev

AU - Lindelof, Poul Erik

PY - 1999

Y1 - 1999

N2 - We report for the first time enhancement of the supercurrent by means of injection in a mesoscopic three terminal planar SN-SNS device made of Al on GaAs. When a current is injected from one of the superconducting Al electrodes at an injection bias V = Δ(T)/e, the dc Josephson current between the other two superconducting electrodes has a maximum, giving evidence for an enhancement due to a nonequilibrium injection into bound Andreev states of the underlying semiconductor. The effect persists to temperatures where the equilibrium supercurrent has vanished.

AB - We report for the first time enhancement of the supercurrent by means of injection in a mesoscopic three terminal planar SN-SNS device made of Al on GaAs. When a current is injected from one of the superconducting Al electrodes at an injection bias V = Δ(T)/e, the dc Josephson current between the other two superconducting electrodes has a maximum, giving evidence for an enhancement due to a nonequilibrium injection into bound Andreev states of the underlying semiconductor. The effect persists to temperatures where the equilibrium supercurrent has vanished.

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KW - SUPERCONDUCTING WEAK LINKS

KW - REFLECTIONS

KW - TRANSISTOR

U2 - 10.1103/PhysRevLett.83.4856

DO - 10.1103/PhysRevLett.83.4856

M3 - Journal article

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 23

ER -

Observation of Supercurrent Enhancement in SNS Junctions by Nonequilibrium Injection into Supercurrent Carrying Bound Andreev States

Abstract

Bibliographical note

Keywords

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