Vortex pinning and motion in randomly frustrated Josephson-junction arrays

Lei Han Tang; Qinghu Chen

doi:10.1016/S0921-4526(99)00756-5

Vortex pinning and motion in randomly frustrated Josephson-junction arrays

Lei Han Tang
, Qinghu Chen

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

3 Citations (Scopus)

Abstract

The current-voltage characteristics of a positionally disordered superconducting Josephson-junction network are investigated numerically. An efficient algorithm is proposed which enables one to simulate networks with up to 1024×1024 nodes. The I-V curves are highly nonlinear in the ordered phase. For a given temperature and external current, it is observed that the resistivity increases with disorder strength. This is in contrast to the behaviour of type-II superconductors in the mixed state where disorder reduces the resistivity through vortex pinning.

Original language	English
Pages (from-to)	227-229
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	279
Issue number	1-3
DOIs	https://doi.org/10.1016/S0921-4526(99)00756-5
Publication status	Published - Apr 2000
Event	The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) - Kowloon Tong, Hong Kong Duration: 21 Jun 1999 → 25 Jun 1999

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10.1016/S0921-4526(99)00756-5

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title = "Vortex pinning and motion in randomly frustrated Josephson-junction arrays",

abstract = "The current-voltage characteristics of a positionally disordered superconducting Josephson-junction network are investigated numerically. An efficient algorithm is proposed which enables one to simulate networks with up to 1024×1024 nodes. The I-V curves are highly nonlinear in the ordered phase. For a given temperature and external current, it is observed that the resistivity increases with disorder strength. This is in contrast to the behaviour of type-II superconductors in the mixed state where disorder reduces the resistivity through vortex pinning.",

author = "Tang, \{Lei Han\} and Qinghu Chen",

note = "Funding Information: One of us (LHT) would like to thank the von Neumann Institute for Computing (KFA J{\"u}lich, Germany) for hospitality, where the manuscript was completed. This work is supported in part by the Hong Kong Baptist University under grant FRG/98-99/II-74. ; The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5) ; Conference date: 21-06-1999 Through 25-06-1999",

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T1 - Vortex pinning and motion in randomly frustrated Josephson-junction arrays

AU - Tang, Lei Han

AU - Chen, Qinghu

N1 - Funding Information: One of us (LHT) would like to thank the von Neumann Institute for Computing (KFA Jülich, Germany) for hospitality, where the manuscript was completed. This work is supported in part by the Hong Kong Baptist University under grant FRG/98-99/II-74.

PY - 2000/4

Y1 - 2000/4

N2 - The current-voltage characteristics of a positionally disordered superconducting Josephson-junction network are investigated numerically. An efficient algorithm is proposed which enables one to simulate networks with up to 1024×1024 nodes. The I-V curves are highly nonlinear in the ordered phase. For a given temperature and external current, it is observed that the resistivity increases with disorder strength. This is in contrast to the behaviour of type-II superconductors in the mixed state where disorder reduces the resistivity through vortex pinning.

AB - The current-voltage characteristics of a positionally disordered superconducting Josephson-junction network are investigated numerically. An efficient algorithm is proposed which enables one to simulate networks with up to 1024×1024 nodes. The I-V curves are highly nonlinear in the ordered phase. For a given temperature and external current, it is observed that the resistivity increases with disorder strength. This is in contrast to the behaviour of type-II superconductors in the mixed state where disorder reduces the resistivity through vortex pinning.

UR - https://www.scopus.com/pages/publications/0033888127

U2 - 10.1016/S0921-4526(99)00756-5

DO - 10.1016/S0921-4526(99)00756-5

M3 - Conference article

AN - SCOPUS:0033888127

SN - 0921-4526

VL - 279

SP - 227

EP - 229

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

IS - 1-3

T2 - The 5th International Conference on Electrical Transport and Optical Properties of Inhomogeneous Media (ETOPIM5)

Y2 - 21 June 1999 through 25 June 1999

ER -

Vortex pinning and motion in randomly frustrated Josephson-junction arrays

Abstract

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