First Principle Electronic Model for High-Temperature Superconductivity

Details First Principle Electronic Model for High-Temperature Superconductivity First Principle Electronic Model for High-Temperature Superconductivity

2002-03-06

arxiv.org/abs/cond-mat/0203117v1

Phys. Rev. B 66 (2002) 100502(R)

Physics

Condensed Matter

Superconductivity

4 pages including 4 figures and 2 tables

Scientific paper

10.1103/PhysRevB.66.100502

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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