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

Anh Kiet Nguyen·A. Sudbo·R. E. Hetzel
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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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Anh Kiet Nguyen, A. Sudbo, R. E. Hetzel. 1996-06-03. Vortex-Loop Unbinding and Flux-Line Lattice Melting in Superconductors. https://doi.org/10.1103/physrevlett.77.1592

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