ScienceAsia 21 (1995): 331-339 |doi: 10.2306/scienceasia1513-1874.1995.21.331

A MICROSCOPIC THEORY FOR THE INTERLAYER ENHANCEMENT OF SUPERCONDUCTIVITY IN THE HTSC'S

P. WINOTAI^a AND I.M. TANC^a,b

ABSTRACT: The effects of interlayer interaction through the particle-particle channel and the particle-hole channel on an electron-phonon (breathing mode) model of the high T_c superconduCtor are studied. The strong coupling Eliashberg formalism is used in the study. It is shown that the interaction through the former channel can appreciably enhance the T_c of the two Cu0₂ layer superconductor (YBa₂Cu₃0₇) over that of the single layer superconductor (La_2-x {Sr, Ba)_xCu0₄). The calculations are done in the weak coupling limit (the model) of the Eliashberg formalism

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a Faculty of Science, Mahidol University, Bangkok 10400, Thailand. and
b Institute of Science & Technology for Research & Development, Mahidol University, Salaya Campus, Nakorn Pathom 73170, Thailand.

Received October 20, 1995