Open AccessTwo-step depinning and reentrant superconducting phase of moving vortex lattice in disordered superconductors
Author(s) -
He Guo-Liang,
He Yan-Wen,
Zhao Zhi-gang,
Mei Liu
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.839
Subject(s) - condensed matter physics , vortex , superconductivity , anisotropy , pinning force , electrical resistivity and conductivity , lattice (music) , flux pinning , magnetic field , physics , magnetic flux , phase transition , materials science , high temperature superconductivity , critical current , mechanics , acoustics , quantum mechanics
We developed a 3D flux_line lattice model with magnetic interactions between intraplane and interplane vortices to simulate the transport properties and the dynamic behavior of disordered anisotropic superconductors. We observed a double peak in the differential resistivity as the driving current increases, which corresponds to a two-step depinning in the vortex motion. Between the two peaks we also observed a reentering pinning phase. We also show that the transition from 2D plastic flow to 3D elastic flow of vortex motion is a recoupling transition which is associated with the double peak in differential resistivity. The increase of critical current of 3D-2D transition with the increasing of magnetic field (decreasing of relative interlayer coupling strength), indicates of a second peak effect.