Defective vortex lattices in layered superconductors with point pins at the extreme type-II limit
نویسندگان
چکیده
منابع مشابه
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 numerical minimization of an appropriate free-energy functional. We find a line of first-order transiti...
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The question of whether layer decoupling and vortex-lattice melting occur seperately or not in the mixed phase of extremely type-II layered superconductors is studied through a partial duality analysis of the layered XY model with uniform frustration. We find that both transitions occur simultaneously if a sufficient degree of both layer anisotropy and of substrate pinning exists. PACS Indices:...
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We study the melting transition of the low-temperature vortex solid in strongly anisotropic layered superconductors with a concentration of random columnar pinning centers small enough so that the areal density of the pins is much less than that of the vortex lines. Both the external magnetic field and the columnar pins are assumed to be oriented perpendicular to the layers. Our method, involvi...
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A review is given on the theory of vortex-glass phases in impure type-II superconductors in an external field. We begin with a brief discussion of the effects of thermal fluctuations on the spontaneously broken U (1) and translation symmetries, on the global phase diagram and on the critical behaviour. Introducing disorder we restrict ourselves to the experimentally most relevant case of weak u...
متن کاملSublimated Decoupling of the Vortex Lattice in Extremely Type-ii Layered Superconductors
The question of whether layer decoupling and vortex-lattice melting occur separately or not in the mixed phase of extremely type-II layered superconductors is studied through a partial duality analysis of the layered XY model with uniform frustration. We find that both transitions occur simultaneously if a sufficient degree of both layer anisotropy and of substrate pinning exists. PACS Indices:...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2004
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.69.100503