Vortex lattice melting in layered superconductors with periodic columnar pins

Details Vortex lattice melting in layered superconductors with periodic columnar pins Vortex lattice melting in layered superconductors with periodic columnar pins

2001-06-14

arxiv.org/abs/cond-mat/0106274v1

Phys. Rev. Lett. 87, 257002 (2001).

Physics

Condensed Matter

Superconductivity

Four pages, 3 Figures

Scientific paper

10.1103/PhysRevLett.87.257002

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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