Abstract
A single-particle density of states is calculated in the strong electron correlation limit of the generalized multiband Hubbard model by exact diagonalization for CuO4 cluster. Several in-gap states are induced by hole doping that are mixtures of Cu d(x2−y2) and b1 O states and Cu d(z2), O a1 states and nonbonding O states. The Fermi level depends on the hole concentration nonmonotonically. The critical concentration of the insulator-metal transition of the Anderson type is estimated.
Published Version
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