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cond-mat.str-el2000
Ground state energy of metallic ferromagnet in a generalized Hubbard model
L. Didukh, O. Kramar, Yu. Skorenkyy
In the present work ferromagnetic ordering in the Hubbard model generalized by taking into account the inter-atomic exchange interaction and correlated hopping in partially filled…
cond-mat.str-el2000★ 3 cited
Some Low-Temperature Properties of a Generalized Hubbard Model with Correlated Hopping
L. Didukh, V. Hankevych, Yu. Skorenkyy
In the present paper we study some correlation effects in a generalized Hubbard model with correlated hopping within low-temperature region using a generalized mean-field approxima…
cond-mat.str-el2000
Electron Correlations in Narrow Energy Bands: Ground State Energy and Metal-Insulator Transition
Leonid Didukh, Yuriy Skorenkyy
The electron correlations in narrow energy bands are examined in framework of the Hubbard model. The single-particle Green function and energy spectrum are obtained in paramagnetic…