Interplay among critical temperature, hole content, and pressure in the cuprate superconductors

Giuseppe G. N. Angilella; Renato Pucci; Fabio Siringo

doi:10.1103/PhysRevB.54.15471

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Interplay among critical temperature, hole content, and pressure in the cuprate superconductors

Giuseppe G. N. Angilella, Renato Pucci, Fabio Siringo

DOI 10.1103/PhysRevB.54.15471 · Physical Review B

T1

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Abstract

Within a BCS-type mean-field approach to the extended Hubbard model, a nontrivial dependence of Tc on the hole content per unit CuO2 is recovered, in good agreement with the celebrated nonmonotonic universal behavior at normal pressure. Evaluation of Tc at higher pressures is then made possible by the introduction of an explicit dependence of the tight-binding band and of the carrier concentration on pressure P. Comparison with the known experimental data for underdoped Bi2212 allows us to single out an "intrinsic" contribution to dTcdP from that due to the carrier concentration, and provides a remarkable estimate of the dependence of the intersite coupling strength on the lattice scale.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure unresolved	unknown
Bi2212 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	1.6 GPa	unknown