Vortex structure and resistive transitions in high-Tc superconductors

Details Vortex structure and resistive transitions in high-Tc superconductors Vortex structure and resistive transitions in high-Tc superconductors

1995-12-14

arxiv.org/abs/supr-con/9512003v1

Physics

Condensed Matter

Superconductivity

8 pages + 6 figures

Scientific paper

10.1103/PhysRevB.53.15305

The nature of the resistive transition for a current applied parallel to the magnetic field in high-Tc materials is investigated by numerical simulation on the three dimensional Josephson junction array model. It is shown by using finite size scaling that for samples with disorder the critical temperature Tp for the c axis resistivity corresponds to a percolation phase transition of vortex lines perpendicularly to the applied field. The value of Tp is higher than the critical temperature for j perpendicular to H, but decreases with the thickness of the sample and with anisotropy. We predict that critical behavior around Tp should reflect in experimentally accessible quantities, as the I-V curves.

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