Supercurrent Flow in Multiterminal Graphene Josephson Junctions

Anne W. Draelos; Ming-Tso Wei; Andrew Seredinski; Hengming Li; Yash Mehta; Kenji Watanabe; Takashi Taniguchi; Ivan V. Borzenets; François Amet; Gleb Finkelstein

doi:10.1021/acs.nanolett.8b04330

Supercurrent Flow in Multiterminal Graphene Josephson Junctions

Anne W. Draelos, Ming-Tso Wei, Andrew Seredinski, Hengming Li, Yash Mehta, Kenji Watanabe, Takashi Taniguchi, Ivan V. Borzenets^*, François Amet, Gleb Finkelstein^*

^*Corresponding author for this work

Department of Physics

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

76 Citations (Scopus)

Abstract

We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in boron nitride with molybdenum-rhenium contacts. Resistance measurements yield multiple resonant features, which are attributed to supercurrent flow among adjacent and nonadjacent Josephson junctions. In particular, we find that superconducting and dissipative currents coexist within the same region of graphene. We show that the presence of dissipative currents primarily results in electron heating and estimate the associated temperature rise. We find that the electrons in encapsulated graphene are efficiently cooled through the electron-phonon coupling.

Original language	English
Pages (from-to)	1039-1043
Journal	Nano Letters
Volume	19
Issue number	2
DOIs	https://doi.org/10.1021/acs.nanolett.8b04330
Publication status	Published - 13 Feb 2019

Research Keywords

ballistic Josephson junctions
electronâphonon coupling
Graphene
multiterminal current flow
superconductivity

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title = "Supercurrent Flow in Multiterminal Graphene Josephson Junctions",

abstract = "We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in boron nitride with molybdenum-rhenium contacts. Resistance measurements yield multiple resonant features, which are attributed to supercurrent flow among adjacent and nonadjacent Josephson junctions. In particular, we find that superconducting and dissipative currents coexist within the same region of graphene. We show that the presence of dissipative currents primarily results in electron heating and estimate the associated temperature rise. We find that the electrons in encapsulated graphene are efficiently cooled through the electron-phonon coupling.",

keywords = "ballistic Josephson junctions, electron{\^a}phonon coupling, Graphene, multiterminal current flow, superconductivity",

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T1 - Supercurrent Flow in Multiterminal Graphene Josephson Junctions

AU - Draelos, Anne W.

AU - Wei, Ming-Tso

AU - Seredinski, Andrew

AU - Li, Hengming

AU - Mehta, Yash

AU - Watanabe, Kenji

AU - Taniguchi, Takashi

AU - Borzenets, Ivan V.

AU - Amet, François

AU - Finkelstein, Gleb

PY - 2019/2/13

Y1 - 2019/2/13

N2 - We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in boron nitride with molybdenum-rhenium contacts. Resistance measurements yield multiple resonant features, which are attributed to supercurrent flow among adjacent and nonadjacent Josephson junctions. In particular, we find that superconducting and dissipative currents coexist within the same region of graphene. We show that the presence of dissipative currents primarily results in electron heating and estimate the associated temperature rise. We find that the electrons in encapsulated graphene are efficiently cooled through the electron-phonon coupling.

AB - We investigate the electronic properties of ballistic planar Josephson junctions with multiple superconducting terminals. Our devices consist of monolayer graphene encapsulated in boron nitride with molybdenum-rhenium contacts. Resistance measurements yield multiple resonant features, which are attributed to supercurrent flow among adjacent and nonadjacent Josephson junctions. In particular, we find that superconducting and dissipative currents coexist within the same region of graphene. We show that the presence of dissipative currents primarily results in electron heating and estimate the associated temperature rise. We find that the electrons in encapsulated graphene are efficiently cooled through the electron-phonon coupling.

KW - ballistic Josephson junctions

KW - electronâphonon coupling

KW - Graphene

KW - multiterminal current flow

KW - superconductivity

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U2 - 10.1021/acs.nanolett.8b04330

DO - 10.1021/acs.nanolett.8b04330

M3 - RGC 21 - Publication in refereed journal

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SN - 1530-6984

VL - 19

SP - 1039

EP - 1043

JO - Nano Letters

JF - Nano Letters

IS - 2

ER -

Supercurrent Flow in Multiterminal Graphene Josephson Junctions

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