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 JAMP  Vol.2 No.5 , April 2014
Electron Correlation in High Temperature Cuprates
Abstract: Electron correlation plays a key role in high-temperature cuprate superconductors. Material-parameter dependence of cuprates is important to clarify the mechanism of high temperature superconductivity. In this study, we examine the ground state of the three-band Hubbard model (d-p model) that explicitly includes oxygen p orbitals. We consider the half-filled case with the large on-site Coulomb repulsion Ud by using the variational Monte Carlo method. The ground state is insulating when Ud is large at half-filling. The ground state undergoes a transition from a metal to a Mott insulator when the level difference εp-εd is increased.
Cite this paper: Yanagisawa, T. , Miyazaki, M. and Yamaji, K. (2014) Electron Correlation in High Temperature Cuprates. Journal of Applied Mathematics and Physics, 2, 72-76. doi: 10.4236/jamp.2014.25010.
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