δ-Function Peak in the Specific Heat of High- Tc Superconductors: Monte Carlo Simulation

Xiao Hu; Seiji Miyashita; Masashi Tachiki

doi:10.1103/PhysRevLett.79.3498

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δ-Function Peak in the Specific Heat of High- Tc Superconductors: Monte Carlo Simulation

Xiao Hu, Seiji Miyashita, Masashi Tachiki

DOI 10.1103/PhysRevLett.79.3498 · Physical Review Letters

T1

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Abstract

A δ-function peak in the specific heat is observed at the melting point Tm of the flux lattice in high- Tc superconductors. It is 18.5kB and 17.5kB in the liquid and the solid phases per flux per layer, respectively, and increases to 23kB in ΔT=0.009Tm around Tm. At Tm the system changes from the triangular flux lattice to a decoupled 2D liquid of vortices. The latent heat is 0.07kBTm per flux per layer.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7-δ 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