Enhancement of critical current density in a superconducting NbSe2 step junction.

Xin He; Yan Wen; Chenhui Zhang; Zhiping Lai; Eugene M Chudnovsky; Xixiang Zhang

doi:10.1039/d0nr03902k

Enhancement of critical current density in a superconducting NbSe2 step junction.

Xin He, Yan Wen, Chenhui Zhang, Zhiping Lai, Eugene M Chudnovsky, Xixiang Zhang

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Abstract

We investigate the transport properties of a NbSe2 nanodevice consisting of a thin region, a thick region and a step junction. The superconducting critical current density of each region of the nanodevice has been studied as a function of temperature and magnetic field. We find that the critical current density has similar values for both the thin and thick regions away from the junction, while the critical current density of the thin region of the junction increases to approximately 1.8 times as compared with the values obtained for the other regions. We attribute such an enhancement of critical current density to the vortex pinning at the surface step. Our study verifies the enhancement of the critical current density by the geometrical-type pinning and sheds light on the application of 2D superconductors.

Original language	English (US)
Pages (from-to)	12076-12082
Number of pages	7
Journal	Nanoscale
Volume	12
Issue number	22
DOIs	https://doi.org/10.1039/d0nr03902k
State	Published - Jun 2 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledged KAUST grant number(s): OSR-2016-CRG5-2977, URF/1/3435
Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under the Award No. URF/1/3435-01-01 and OSR-2016-CRG5-2977.

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title = "Enhancement of critical current density in a superconducting NbSe2 step junction.",

abstract = "We investigate the transport properties of a NbSe2 nanodevice consisting of a thin region, a thick region and a step junction. The superconducting critical current density of each region of the nanodevice has been studied as a function of temperature and magnetic field. We find that the critical current density has similar values for both the thin and thick regions away from the junction, while the critical current density of the thin region of the junction increases to approximately 1.8 times as compared with the values obtained for the other regions. We attribute such an enhancement of critical current density to the vortex pinning at the surface step. Our study verifies the enhancement of the critical current density by the geometrical-type pinning and sheds light on the application of 2D superconductors.",

author = "Xin He and Yan Wen and Chenhui Zhang and Zhiping Lai and Chudnovsky, {Eugene M} and Xixiang Zhang",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): OSR-2016-CRG5-2977, URF/1/3435 Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under the Award No. URF/1/3435-01-01 and OSR-2016-CRG5-2977.",

year = "2020",

month = jun,

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doi = "10.1039/d0nr03902k",

language = "English (US)",

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journal = "Nanoscale",

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T1 - Enhancement of critical current density in a superconducting NbSe2 step junction.

AU - He, Xin

AU - Wen, Yan

AU - Zhang, Chenhui

AU - Lai, Zhiping

AU - Chudnovsky, Eugene M

AU - Zhang, Xixiang

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledged KAUST grant number(s): OSR-2016-CRG5-2977, URF/1/3435 Acknowledgements: This publication is based on research supported by the King Abdullah University of Science and Technology (KAUST), Office of Sponsored Research (OSR) under the Award No. URF/1/3435-01-01 and OSR-2016-CRG5-2977.

PY - 2020/6/2

Y1 - 2020/6/2

N2 - We investigate the transport properties of a NbSe2 nanodevice consisting of a thin region, a thick region and a step junction. The superconducting critical current density of each region of the nanodevice has been studied as a function of temperature and magnetic field. We find that the critical current density has similar values for both the thin and thick regions away from the junction, while the critical current density of the thin region of the junction increases to approximately 1.8 times as compared with the values obtained for the other regions. We attribute such an enhancement of critical current density to the vortex pinning at the surface step. Our study verifies the enhancement of the critical current density by the geometrical-type pinning and sheds light on the application of 2D superconductors.

AB - We investigate the transport properties of a NbSe2 nanodevice consisting of a thin region, a thick region and a step junction. The superconducting critical current density of each region of the nanodevice has been studied as a function of temperature and magnetic field. We find that the critical current density has similar values for both the thin and thick regions away from the junction, while the critical current density of the thin region of the junction increases to approximately 1.8 times as compared with the values obtained for the other regions. We attribute such an enhancement of critical current density to the vortex pinning at the surface step. Our study verifies the enhancement of the critical current density by the geometrical-type pinning and sheds light on the application of 2D superconductors.

UR - http://hdl.handle.net/10754/662980

UR - http://xlink.rsc.org/?DOI=D0NR03902K

UR - http://www.scopus.com/inward/record.url?scp=85086346453&partnerID=8YFLogxK

U2 - 10.1039/d0nr03902k

DO - 10.1039/d0nr03902k

M3 - Article

C2 - 32478360

SN - 2040-3364

VL - 12

SP - 12076

EP - 12082

JO - Nanoscale

JF - Nanoscale

IS - 22

ER -

Enhancement of critical current density in a superconducting NbSe2 step junction.

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