TY - JOUR
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 - http://www.scopus.com/inward/record.url?scp=0033888127&partnerID=8YFLogxK
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 -