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Electron–Phonon Interaction in Mixed Valence Systems
Author(s) -
Brouers F.,
de Menezes O. L. T.
Publication year - 1981
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221040218
Subject(s) - phonon , condensed matter physics , hamiltonian (control theory) , adiabatic process , valence (chemistry) , renormalization , physics , electron , adiabatic theorem , quantum mechanics , mathematics , mathematical optimization
A Hamiltonian describing mixed valence compounds and including d and f electron–phonon coupling is considered. It is shown that the renormalization of the electronic energy parameters induced by the electron–phonon interaction depends strongly on the nature (static or adiabatic) of the approximation used. The importance of the d electron‐phonon coupling on the narrowing of the f level and the softening of the phonon modes is discussed.