Phase diagram of high-Tc superconductors: Influence of anisotropy and disorder

E. A. Jagla; C. A. Balseiro

doi:10.1103/PhysRevB.55.3192

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Phase diagram of high-Tc superconductors: Influence of anisotropy and disorder

E. A. Jagla, C. A. Balseiro

DOI 10.1103/PhysRevB.55.3192 · Physical Review B

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Abstract

We propose a phase diagram for the vortex structure of high-temperature superconductors which incorporates the effects of anisotropy and disorder. It is based on numerical simulations using the three-dimensional Josephson-junction array model. We support the results with an estimation of the internal energy and configurational entropy of the system. Our results give a unified picture of the behavior of the vortex lattice, from the very anisotropic Bi2Sr2CaCu2O8 to the less anisotropic YBa2Cu3O7, and from the first-order melting ocurring in clean samples to the continuous transitions observed in samples with defects.

Source-reported materials — not catalogue approval

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