Composite-operator approach for the p-d-mixing model of oxide superconductors
H. Matsumoto, M. Sasaki, S. Ishihara, M. Tachiki
DOI 10.1103/PhysRevB.46.3009 · Physical Review B
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Abstract
A formulation of the p-d-mixing model of oxide superconductors is presented by introducing composite operators that describe electronic excitations associated with the Cu-O covalent bond. A conduction band developing inside the charge-transfer gap with hole doping can be understood as the band formed by mixing among p and d electrons and these composite electronic excitations.
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