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

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

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)12076-12082
Number of pages7
JournalNanoscale
Volume12
Issue number22
DOIs
StatePublished - 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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