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Two-step depinning and reentrant superconducting phase of moving vortex lattice in disordered superconductors

He Guo-Liang He Yan-Wen Zhao Zhi-Gang Liu Mei

Two-step depinning and reentrant superconducting phase of moving vortex lattice in disordered superconductors

He Guo-Liang, He Yan-Wen, Zhao Zhi-Gang, Liu Mei
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Publishing process
  • Received Date:  24 May 2005
  • Accepted Date:  01 July 2005
  • Published Online:  05 January 2006

Two-step depinning and reentrant superconducting phase of moving vortex lattice in disordered superconductors

  • 1. 东南大学物理系,南京 210096

Abstract: 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.

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