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Vortex lattice melting in layered superconductors with periodic columnar pins

Chandan Dasgupta·Oriol T. Valls
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Abstract

The melting transition of the vortex lattice in highly anisotropic, layered superconductors with commensurate, periodic columnar pins is studied in a geometry where magnetic field and columnar pins are normal to the layers. Thermodynamic properties and equilibrium density distributions are obtained from numerical minimizations of an appropriate free-energy functional. We find a line of first-order transitions that ends at a critical point as the pin concentration is increased. A simple Landau theory providing a semi-quantitative explanation of the numerical results is proposed.

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Chandan Dasgupta, Oriol T. Valls. 2001-06-14. Vortex lattice melting in layered superconductors with periodic columnar pins. https://doi.org/10.1103/physrevlett.87.257002

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