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Gutzwiller wavefunction in the three-band Hubbard model: A variational Monte Carlo study

A. Oguri·T. Asahta·S. Maekawa
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Abstract

The Gutzwiller wave function for the three-band Hubbard model on a two dimensional CuO$_2$ plane is studied by using the variational Monte Carlo (VMC) method in the limit $U_d \to \infty$, where $U_d$ is the Coulomb repulsion between holes on a Cu site. The VMC results for the energy and the fraction of $d$-holes are compared with those of the Rice-Ueda type Gutzwiller approximation (GA). The difference between the VMC and the GA results are most pronounced at half-filling, and away from half-filling the two results agree well in both the hole-doped and the electron-doped cases. The doping dependence of the momentum distribution function is also studied.

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A. Oguri, T. Asahta, S. Maekawa. 1993-07-17. Gutzwiller wavefunction in the three-band Hubbard model: A variational Monte Carlo study. https://doi.org/10.1103/physrevb.49.6880

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