Effect of disorder on the vortex-lattice melting transition

Details Effect of disorder on the vortex-lattice melting transition Effect of disorder on the vortex-lattice melting transition

1996-03-19

arxiv.org/abs/cond-mat/9603128v1

Physics

Condensed Matter

4 pages + 2 figures

Scientific paper

10.1103/PhysRevLett.77.1588

We use a three dimensional stacked triangular network of Josephson junctions as a model for the study of vortex structure in the mixed state of high Tc superconductors. We show that the addition of disorder destroys the first order melting transition occurring for clean samples. The melting transition splits in two different (continuous) transitions, ocurring at temperatures Ti and Tp (>Ti). At Ti the perpendicular-to-field superconductivity is lost, and at Tp the parallel-to-field superconductivity is lost. These results agree well with recent experiments in YBaCuO.

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