EFFECT OF PRESSURE AND OF DOPING ON SUPERCONDUCTIVITY IN THE DOUBLE-MERCURY-LAYER CUPRATE HG-2 (N=2) - A QUANTITATIVE-ANALYSIS BASED ON INDIRECT-EXCHANGE PAIRING

Results of recent experiments by Acha et al. [Solid State Commun. 102 (1997) 1] on the effect of pressure on critical temperatures of five s amples of the double-mercury-layer compound Hg2Ba2Y1-xCaxCu2O8-delta ( in the present paper abbreviated as Hg-2 (N = 2)) are analyzed in the framework of indirect-exchange Cooper-pair formation via diamagnetic o xygen anions, developed in earlier publications. It is shown that all experimental results can be quantitatively interpreted on the basis of the indirect-exchange formalism. In particular, observed large increa ses in Te (greater than or equal to 55K) over the pressure range P=0-2 0GPa are quantitatively reproduced. Similarities and differences with the single-mercury-layer cuprates are discussed.