Negative magnetoresistance slope in superconducting granular films

Boris Ya Shapiro, Irina Shapiro, Daniel Levi, Avner Shaulov, Yosef Yeshurun

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

A phenomenological theory is developed to explain the recently observed negative magnetoresistance slope in ultra-thin granular YBa2Cu 2O7-δ films. Viewing this system as a two-dimensional array of extended Josephson junctions, we numerically solve the sine-Gordon equations including a viscosity term that increases linearly with the external field. The solution yields a negative magnetoresistance slope setting in at a field that is determined by the geometry and thus independent of temperature, in agreement with the experimental results.

Original languageEnglish
Pages (from-to)51-54
Number of pages4
JournalPhysica C: Superconductivity and its Applications
Volume501
DOIs
StatePublished - 15 Jun 2014

Bibliographical note

Funding Information:
We acknowledge support of the Deutsche Forschungsgemeinschaft through a DIP project. Y.Y. acknowledges a support of the Israel Science Foundation (Grant No. 164/12 ).

Funding

We acknowledge support of the Deutsche Forschungsgemeinschaft through a DIP project. Y.Y. acknowledges a support of the Israel Science Foundation (Grant No. 164/12 ).

FundersFunder number
Deutsche Forschungsgemeinschaft
Israel Science Foundation164/12

    Keywords

    • Josephson vortices
    • Superconducting films
    • Vortex dynamics

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