Coupled-spin-mobile-hole model for high-Tc superconducting oxides

E. Y. Loh, Jr.; T. Martin; P. Prelovsek; D. K. Campbell

doi:10.1103/PhysRevB.38.2494

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Coupled-spin-mobile-hole model for high-Tc superconducting oxides

E. Y. Loh, Jr., T. Martin, P. Prelovsek, D. K. Campbell

DOI 10.1103/PhysRevB.38.2494 · Physical Review B

T1

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Abstract

A model representing a system of coupled localized spins and mobile holes and relevant to superconducting oxides is analyzed by performing both exact diagonalizations on small systems and variational calculations. Ground-state expectation values, susceptibilities, optical conductivity, and pairing correlations are calculated for systems with up to six unit cells arranged on a ring or representing a square lattice. With increasing spin-mobile-hole coupling, our results show a transition to a regime of mobile singlets and short-range magnetic correlations. On the square lattice, the interaction weakly enhances the d-wave pairing, but suppresses s-wave and extended s*-wave correlations.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown