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

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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 CuO$_2$ 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 $K_ρ = (2-n)^2/2$, where $n$ is the particle density.

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C. D. Batista, F. Lema, A. A. Aligia. 1995-05-10. Superconductivity from correlated hopping. https://doi.org/10.1103/physrevb.52.6223

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