Electron Spectrum and Dieleclric Susceptibility of the Hubbard Model with Local Lattice Anharmonicity
I.V. Stasyuk and A.M. Shvaika
Institute for Condensed Matter Physics, Ukrainian Academy of Sciences, Svientsitsky St. 1, Lviv 290011, Ukraine
Full Text PDF
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.
DOI: 10.12693/APhysPolA.85.363
PACS numbers: 74.20.Mn, 71.45.Gm