Flux-lattice melting in layered superconductors

R. Šášik; D. Stroud

doi:10.1103/PhysRevB.48.9938

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Flux-lattice melting in layered superconductors

R. Šášik, D. Stroud

DOI 10.1103/PhysRevB.48.9938 · Physical Review B

T1

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Abstract

We describe a new representation to treat flux-lattice melting in an extreme type-II layered superconductor, generalizing an approach of Hu and MacDonald. The Ginzburg-Landau free-energy functional is expanded in eigenstates which are products of the lowest Landau levels in the xy plane, and tight-binding Bloch states in the z direction. The various correlation functions can be evaluated efficiently by Monte Carlo simulations. The melting temperature for a model of Bi2Sr2CaCu2O8+δ, as estimated from the apparently simultaneous disappearance of Bragg peaks in the density-density correlation function, and of long-range interlayer correlations, is estimated to be about 30 K at a field of 1 T, in reasonable agreement with the experimental value of 26 K.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2Sr2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	26	Pressure not reported	unknown