1996/08/27 by G. G. N. Angilella, Giuseppe G. N. Angilella, R. Pucci +2 · 1 citation
Earth and Planetary Sciences · Physics and Astronomy · #Advanced Condensed Matter Physics #High-pressure geophysics and materials #Physics of Superconductivity and Magnetism #cond-mat #supr-con
paper · pdf · doi:10.1103/physrevb.54.15471
published as Phys. Rev. B 54, 15471 (1996) · REVTeX 8 pages, including 5 embedded PostScript figures; other required macros included; to be published in Phys. Rev. B (vol. 54)
arxiv created 1996/08/27 · openalex publication_date 1996/12/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
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 \fracdTcdP from that due to the carrier concentration, and provides a remarkable estimate of the dependence of the intersite coupling strength on the lattice scale.