Interplay between local electron correlation and Janh-Teller electron-phonon interaction

Details Interplay between local electron correlation and Janh-Teller electron-phonon interaction Interplay between local electron correlation and Janh-Teller electron-phonon interaction

2006-03-17

arxiv.org/abs/cond-mat/0603449v1

Physical Review B, Vol. 73, 113109 (2006)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevB.73.113109

The infinite-$U$ Anderson model coupled to a Jahn-Teller phonon is studied using the slave boson method on the basis of the large degeneracy expansion (1/N) scheme. The model Hamiltonian acts on the orbital degrees of freedom. The main focus is on the interplay between strong local electron correlation and weak Jahn-Teller electron-phonon interaction. The Kondo temperature is found to decrease by Jahn-Teller interaction. The influence of the Jahn-Teller interaction on dynamical correlation functions is very significant in sharp contrast with the case of the Holstein-type phonon which couples to charge degrees of freedom.

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