Abstract
The properties of correlated holes within a CuO 2plane of a high temperature superconductor are investigated as a function of doping by holes. The correlated ground state of a four-band Hubbard model is found for realistic parameters by making use of local ansatz which emphasizes local correlations between holes. It is found these correlations are particularly strong within orbitale. They lead to a drastic modification of the ground state, and result in only ≃ 3% population of d 8 configuration. The doped holes have ≃ 70% oxygen character, in agreement with experimental observations, as well as with the results of finite cluster diagonalization.
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Oleś, A.M., Zaanen, J. (1990). Strong Electron Correlations in C u O 2 Planes of HighTemperature Superconductors. In: Avishai, Y. (eds) Recent Progress in Many-Body Theories. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-3798-4_7
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DOI: https://doi.org/10.1007/978-1-4615-3798-4_7
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