First Principle 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 Principle Electronic Model for High-Temperature Superconductivity

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

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Abstract

Using the structural data of the La2CuO4 compound both in the 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 fourth and second neareast neighbors respectively. By numerically studying this hamiltonian we have then reproduced the main experimental features of this HTc compound: d-wave superconductivity is stabilized at small but finite doping delta>6% away from the antiferromagnetic region and some evidence of dynamical stripes is found at commensurate filling 1/8.

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V. I. Anisimov, M. A. Korotin, I. A. Nekrasov, Z. V. Pchelkina, S. Sorella. 2002-03-06. First Principle Electronic Model for High-Temperature Superconductivity. https://doi.org/10.1103/physrevb.66.100502

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