Defect-induced melting of vortices in high-Tc superconductors: A model based on continuum elasticity theory

Jürgen Dietel; Hagen Kleinert

doi:10.1103/PhysRevB.74.024515

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Defect-induced melting of vortices in high-Tc superconductors: A model based on continuum elasticity theory

Jürgen Dietel, Hagen Kleinert

DOI 10.1103/PhysRevB.74.024515 · Physical Review B

T1

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Abstract

We set up a melting model for vortex lattices in high-temperature superconductors based on the continuum elasticity theory. The model is Gaussian and includes defect fluctuations by means of a discrete-valued vortex gauge field. We derive the melting temperature of the lattice and predict the size of the Lindemann number. Our result agrees well with experiments for YBa2Cu3O7−δ, and with modifications also for Bi2Sr2CaCu2O8. We calculate the jumps in the entropy and the magnetic induction at the melting transition.

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