Abstract
We have studied the role of interlayer interactions (W) in the pressure dependence of T c of layered superconductors. The expressions for dT c /dP are obtained by including the effects of layered structure within the framework of two different proposed models, namely the negative-U Hubbard model and the Hirsch model. We observe that the inclusion of interlayer interaction provides better explanation of pressure dependence of T c . Our numerical results show that the systems having one CuO2 layer per unit cell may be well described by small values of W while the larger values of W accounts for the systems having two or more superconducting layers in a unit cell. The calculated values of dT c /dP vs. W are found to be in good agreement with those of experimental results obtained for various high T c superconductors of cuprate family.
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