Melting of the Nanocrystalline Vortex Matter in Highly Anisotropic High-Temperature Superconductors

Yadin Y. Goldschmidt; Eduardo Cuansing

doi:10.1103/PhysRevLett.95.177004

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Melting of the Nanocrystalline Vortex Matter in Highly Anisotropic High-Temperature Superconductors

Yadin Y. Goldschmidt, Eduardo Cuansing

DOI 10.1103/PhysRevLett.95.177004 · Physical Review Letters

T1

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Abstract

Multilevel Monte Carlo simulations of the vortex matter in the highly anisotropic high-temperature superconductor Bi2Sr2CaCu2O8 were performed. We introduced low concentration of columnar defects satisfying Bϕ≤B. Both the electromagnetic and Josephson interactions among pancake vortices were included. The nanocrystalline, nanoliquid, and homogeneous liquid phases were identified in agreement with experiments. We observed the two-step melting process and also noted an enhancement of the structure factor just prior to the melting transition. A proposed theoretical model is in agreement with our findings.

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.	90	Pressure not reported	unknown