Vortex lattice melting in layered superconductors with periodic columnar pins

The melting 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 numeri...

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Veröffentlicht in:Physical review letters 2001-12, Vol.87 (25), p.257002-257002, Article 257002
Hauptverfasser: Dasgupta, C, Valls, O T
Format: Artikel
Sprache:eng
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Zusammenfassung:The melting 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 minimization 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. We quantitatively determine the location of this critical point and show that it is experimentally accessible.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.87.257002