Negative magnetoresistance slope in superconducting granular films

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

doi:10.1016/j.physc.2014.04.001

Negative magnetoresistance slope in superconducting granular films

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

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

A phenomenological theory is developed to explain the recently observed negative magnetoresistance slope in ultra-thin granular YBa₂Cu ₂O_7-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 language	English
Pages (from-to)	51-54
Number of pages	4
Journal	Physica C: Superconductivity and its Applications
Volume	501
DOIs	https://doi.org/10.1016/j.physc.2014.04.001
State	Published - 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 ).

Funders	Funder number
Deutsche Forschungsgemeinschaft
Israel Science Foundation	164/12

Keywords

Josephson vortices
Superconducting films
Vortex dynamics

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10.1016/j.physc.2014.04.001

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title = "Negative magnetoresistance slope in superconducting granular films",

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.",

keywords = "Josephson vortices, Superconducting films, Vortex dynamics",

author = "Shapiro, \{Boris Ya\} and Irina Shapiro and Daniel Levi and Avner Shaulov and Yosef Yeshurun",

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 ).",

year = "2014",

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day = "15",

doi = "10.1016/j.physc.2014.04.001",

language = "אנגלית",

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T1 - Negative magnetoresistance slope in superconducting granular films

AU - Shapiro, Boris Ya

AU - Shapiro, Irina

AU - Levi, Daniel

AU - Shaulov, Avner

AU - Yeshurun, Yosef

N1 - 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 ).

PY - 2014/6/15

Y1 - 2014/6/15

N2 - 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.

AB - 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.

KW - Josephson vortices

KW - Superconducting films

KW - Vortex dynamics

UR - https://www.scopus.com/pages/publications/84899555049

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SN - 0921-4534

VL - 501

SP - 51

EP - 54

JO - Physica C: Superconductivity and its Applications

JF - Physica C: Superconductivity and its Applications

ER -

Negative magnetoresistance slope in superconducting granular films

Abstract

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Keywords

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