Ggn. Angilella et al., INTERPLAY AMONG CRITICAL-TEMPERATURE, HOLE CONTENT, AND PRESSURE IN THE CUPRATE SUPERCONDUCTORS, Physical review. B, Condensed matter, 54(21), 1996, pp. 15471-15477
Within a BCS-type mean-field approach to the extended Hubbard model, a
nontrivial dependence of T-c on the hole content per unit CuO2 is rec
overed, in good agreement with the celebrated nonmonotonic universal b
ehavior at normal pressure. Evaluation of T-c at higher pressures is t
hen made possible by the introduction of an explicit dependence of the
tight-binding band and of the carrier concentration on pressure P. Co
mparison with the known experimental data for underdoped Bi2212 allows
us to single out an ''intrinsic'' contribution to dT(c)/dP from that
due to the carrier concentration, and provides a remarkable estimate o
f the dependence of the intersite coupling strength on the lattice sca
le.