Vortex-Loop Unbinding and Flux-Line Lattice Melting in Superconductors

1996/06/03 by Anh Kiet Nguyen, A. Sudbo, R. E. Hetzel · 1 citation
Physics and Astronomy · #cond-mat

paper · pdf · doi:10.1103/physrevlett.77.1592

4 pages, 3 postscript figures

arxiv created 1996/06/03 · arxiv updated 2009/11/30

Abstract

We study the interplay between a novel vortex-loop unbinding in finite magnetic field at T=T_V and flux-line lattice (FLL) melting at T=T_M in type-II superconductors. The FLL melts due to nucleation of vortex loops parallel to c-axis, connected to flux lines. For moderate anisotropy, phase coherence along c-axis is lost at T_V > T_M due to an ab-plane vortex-loop unbinding with loops located close to thermal FLL fluctuations. For large anisotropy, phase coherence along c-axis is lost at T_V < T_M due to nucleation of ab-plane vortex-loops uncorrelated to flux lines.

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