INTERLAYER EFFECTS IN HG-HIGH-T-C-CUPRATES UNDER HIGH-PRESSURE

Measurements of T-c(max) and dT(c)(max)/dp for homological series of H gBa2Can-1CunO2n+2+delta superconductors were carried out for the sampl es with n = 1-6 sublayers in the unit cell. The experimental results a re compared with the predictions of the theory, developed by Wheatley et al. [Nature 333 (1988) 121; Phys. Rev. B 37 (1988) 5897] for the in terlayer tunnelling of the holon pairs. We review the theory and apply it to n > 4 cases and show the agreements and disagreements of theore tical predictions with experimental results. (C) 1998 Elsevier Science B.V.