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Electron Correlation in High Temperature Cuprates

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DOI: 10.4236/jamp.2014.25010    3,054 Downloads   3,702 Views   Citations

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.

Conflicts of Interest

The authors declare no conflicts of interest.

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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