First principles electronic model for high-temperature superconductivity

V. I. Anisimov; M. A. Korotin; I. A. Nekrasov; Z. V. Pchelkina; S. Sorella

doi:10.1103/PhysRevB.66.100502

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First principles electronic model for high-temperature superconductivity

V. I. Anisimov, M. A. Korotin, I. A. Nekrasov, Z. V. Pchelkina, S. Sorella

DOI 10.1103/PhysRevB.66.100502 · Physical Review B

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Abstract

Using the structural data of the La2CuO4 compound both in the distorted low-temperature tetragonal phase and in the isotropic phase, we have derived an effective t−J model with hoppings t and superexchange interactions J extended up to the fourth- and second-nearest-neighbors, respectively. By numerically studying this Hamiltonian we have then reproduced the main experimental features of this high-temperature superconductivity compound: d-wave superconductivity is stabilized at small but finite doping δ≳6% away from the antiferromagnetic region and some evidence of dynamical stripes is found at commensurate filling 1/8.

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