Superconductivity from correlated hopping

C. D. Batista; F. Lema; A. A. Aligia

doi:10.1103/PhysRevB.52.6223

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Superconductivity from correlated hopping

C. D. Batista, F. Lema, A. A. Aligia

DOI 10.1103/PhysRevB.52.6223 · Physical Review B

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Abstract

We consider a chain described by a next-nearest-neighbor hopping combined with a nearest-neighbor spin flip. In two dimensions this three-body term arises from a mapping of the three-band Hubbard model for CuO2 planes to a generalized t-J model and for large O-O hopping favors resonance-valence-bond superconductivity of predominantly d-wave symmetry. Solving the ground-state and low-energy excitations by analytical and numerical methods we find that the chain is a Luther-Emery liquid with correlation exponent Kρ=(2-n)2/2, where n is the particle density.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
CuO2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown