QUANTUM PARAELECTRIC MODEL FOR LAYERED SUPERCONDUCTORS

We consider a Hubbard-model (H) layer of charged-carrier fraction x mu ch less than 1, and an rms buckling angle s much less than 1, that is elastically and electrically coupled to anharmonic (oxygen) dipoles in a ferroelectric Bilz-model (B) layer. We find that (a) the B-layer di poles are driven to a paraelectric phase by H-layer zero-point fluctua tions; (b) the c-axis (dipolar, optical) and H-layer (acoustic) modes are mixed by s to form omega(+/-)(q) modes; and (c) the mode exchange, enhanced by a (omega(+)(2) - omega(-)(2))(-1) similar to s(-1) resona nt denominator, produces dynamical local carrier pairing and 2D Anders on-Morel d(x2-y2)-type superconductivity, with peaks or plateaus in T- c(x).