Evaporation of the Pancake-Vortex Lattice in Weakly Coupled Layered Superconductors

M. J. W. Dodgson; A. E. Koshelev; V. B. Geshkenbein; G. Blatter

doi:10.1103/PhysRevLett.84.2698

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Evaporation of the Pancake-Vortex Lattice in Weakly Coupled Layered Superconductors

M. J. W. Dodgson, A. E. Koshelev, V. B. Geshkenbein, G. Blatter

DOI 10.1103/PhysRevLett.84.2698 · Physical Review Letters

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Abstract

We calculate the melting line of the pancake-vortex system in a layered superconductor, interpolating between two-dimensional (2D) melting at high fields and the zero-field limit of single-stack evaporation. Long-range interactions between pancake vortices in different layers permit a mean-field approach, the “substrate model,” where each 2D crystal fluctuates in a substrate potential due to the vortices in other layers. We find the thermal stability limit of the 3D solid, and compare the free energy to a 2D liquid to determine the first-order melting transition and its jump in entropy.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown