Quantum Paraelectric Model for Layered Superconductors

S. R. Shenoy; V. Subrahmanyam; A. R. Bishop

doi:10.1103/PhysRevLett.79.4657

← Back to search

Quantum Paraelectric Model for Layered Superconductors

S. R. Shenoy, V. Subrahmanyam, A. R. Bishop

DOI 10.1103/PhysRevLett.79.4657 · Physical Review Letters

T1

Active bibliographic source — not scientific approval

Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.

Abstract

We consider a Hubbard-model (H) layer of charged-carrier fraction x≪1, and an rms buckling angle s≪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 dipoles are driven to a paraelectric phase by H-layer zero-point fluctuations; (b) the c-axis (dipolar, optical) and H-layer (acoustic) modes are mixed by s to form ω±(q) modes; and (c) the mode exchange, enhanced by a (ω+2−ω−2)−1∼s−1 resonant denominator, produces dynamical local carrier pairing and 2D Anderson-Morel dx2−y2–type superconductivity, with peaks or plateaus in Tc(x).

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	0.1	Pressure not reported	unknown