%0 Journal Article
%T Electron Correlation in High Temperature Cuprates
%A Takashi Yanagisawa
%A Mitake Miyazaki
%A Kunihiko Yamaji
%J Journal of Applied Mathematics and Physics
%P 72-76
%@ 2327-4379
%D 2014
%I Scientific Research Publishing
%R 10.4236/jamp.2014.25010
%X 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<br />
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 ¦Åp-¦Åd is increased.
%K High-Temperature Superconductor
%K Electron Correlation
%K Mott Insulator
%K Metal-Insulator Transition
%K Charge-Transfer Insulator
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=45268