Metal-Insulator Transition in a Generalized Hubbard Model with Correlated Hopping at Half-Filling

Details Metal-Insulator Transition in a Generalized Hubbard Model with Correlated Hopping at Half-Filling Metal-Insulator Transition in a Generalized Hubbard Model with Correlated Hopping at Half-Filling

1998-11-16

arxiv.org/abs/cond-mat/9811213v1

phys. stat. sol. (b), vol. 211, no. 2, p. 703 (1999)

Physics

Condensed Matter

Strongly Correlated Electrons

11 pages, 2 eps figures, Latex 2.09, submitted to Phys. Stat. Sol. (B)

Scientific paper

In the present paper metal-insulator transition is studied in a generalized Hubbard model with correlated hopping at half-filling and zero temperature. Single-particle Green function and energy spectrum of electron system are calculated. The expressions for energy gap width and the concentration of polar states (holes or doublons) are obtained. The conditions for metallic and insulating states are found.

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