Critical currents at the Bragg glass to vortex glass transition

Details Critical currents at the Bragg glass to vortex glass transition Critical currents at the Bragg glass to vortex glass transition

2003-08-25

arxiv.org/abs/cond-mat/0308511v2

Phys. Rev. Lett. 92, 117002 (2004)

Physics

Condensed Matter

Superconductivity

4 pages, 5 figures. Introduction changed. Accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.92.117002

We present simulations of the transport properties of superconductors at the transition from the Bragg glass (BG) to the vortex glass (VG) phase. We study the frustrated anisotropic 3D XY model with point disorder, which has been shown to have a first order transition as a function of the intensity of disorder. We add an external current to the model and we obtain current-voltage curves as a function of disorder at a low temperature. We find that the in-plane critical current has a steep increase at the BG-VG transition, while the c-axis critical current has a discontinous jump down, this later result in agreement with the first-order character of the transition.

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