Armenian Journal of Physics

FALICOV-KIMBALL MODEL EXTENDED BY ELECTRON-PHONON INTERACTION (EPI)

Bhowmick, S.K. and Ghosh, N.K. (2011) FALICOV-KIMBALL MODEL EXTENDED BY ELECTRON-PHONON INTERACTION (EPI). Armenian Journal of Physics, 4 (1). pp. 30-37. ISSN 1829-1171

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Abstract

The effect of electron-phonon interaction (EPI) has been investigated using extended Falicov-Kimball model in an exact method. Phonon-induced hybridization term is considered in terms of electron operators. Average occupation number off-electrons, entropy, specific heat, and spin susceptibility are calculated. First-order valence transition occurs at an increased value of EPI. Double-peak structure is observed in specific heat curves. The specific heat coefficient g rises sharply at low temperatures. EPI increases the rate of growth of antiferromagnetic correlations.

Item Type:Article
Subjects:Physics > 10.The physics of elementary particles and fields
ID Code:334
Deposited By:Prof. Vladimir Aroutiounian
Deposited On:20 Jun 2011 16:40
Last Modified:03 Jul 2011 14:14

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