Negative magnetoresistance slope in superconducting granular films

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

doi:https://doi.org/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

Bar-Ilan University

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

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

Keywords

Josephson vortices
Superconducting films
Vortex dynamics

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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https://doi.org/10.1016/j.physc.2014.04.001

Cite this

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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",

month = jun,

day = "15",

doi = "https://doi.org/10.1016/j.physc.2014.04.001",

language = "الإنجليزيّة",

volume = "501",

pages = "51--54",

journal = "Physica C: Superconductivity and its Applications",

issn = "0921-4534",

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TY - JOUR

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 - http://www.scopus.com/inward/record.url?scp=84899555049&partnerID=8YFLogxK

U2 - https://doi.org/10.1016/j.physc.2014.04.001

DO - https://doi.org/10.1016/j.physc.2014.04.001

M3 - مقالة

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

Keywords

All Science Journal Classification (ASJC) codes

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