Dynamics of current driven disordered Josephson junction arrays

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We present dynamical simulations of disordered Josephson junction arrays with a bias current. We study the IV characteristics and vortex dynamics as a function of integer frustration f = n, weak frustration f = n + {delta} ({delta} {much_lt} 1) and full frustration pairs close to the critical current i{sub c}. We focus on the study of the plastic flow of vortices (f = n + {delta}), of vortex-antivortex pairs (f = n), and the dynamics of domain walls (f = n + 1/2) close to i{sub c}. We analyze the voltage noise and vortex fluctuations in the plastic flow ... continued below

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13 p.

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Dominguez, D.; Gronbech-Jensen, N. & Bishop, A.R. April 1, 1995.

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Description

We present dynamical simulations of disordered Josephson junction arrays with a bias current. We study the IV characteristics and vortex dynamics as a function of integer frustration f = n, weak frustration f = n + {delta} ({delta} {much_lt} 1) and full frustration pairs close to the critical current i{sub c}. We focus on the study of the plastic flow of vortices (f = n + {delta}), of vortex-antivortex pairs (f = n), and the dynamics of domain walls (f = n + 1/2) close to i{sub c}. We analyze the voltage noise and vortex fluctuations in the plastic flow regimes. We obtain the phase diagram for the different dynamical regimes as a function of disorder and applied current. We also study the dynamical critical behavior of depinning close to i{sub c} in the gauge glass limit of the model, f {yields} {infinity}, calculating critical exponents for the voltage onset and voltage fluctuations. We discuss our results within the context of present theories of the non-linear dynamics of disordered media.

Physical Description

13 p.

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OSTI as DE95009418

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  • Workshop on macroscopic quantum phenomena and coherence in superconducting networks, Frascati (France), 1-5 Mar 1995

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  • Other: DE95009418
  • Report No.: LA-UR--95-967
  • Report No.: CONF-9503124--1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 42522
  • Archival Resource Key: ark:/67531/metadc682441

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  • April 1, 1995

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 29, 2016, 8:56 p.m.

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Dominguez, D.; Gronbech-Jensen, N. & Bishop, A.R. Dynamics of current driven disordered Josephson junction arrays, article, April 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc682441/: accessed August 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.