Electron Spectrum and Dieleclric Susceptibility of the Hubbard Model with Local Lattice Anharmonicity
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The investigation of single-electron spectrum of the Hubbard model with local lattice anharmonicity is performed. The influence of the interaction with the vibrational subsystem on the effective exchange constant is considered. The static transverse dielectric susceptibility of the model is calculated. Analysis of the possible dielectric anomalies is performed on this basis.
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