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Theory of side‐bands in a cooperative Jahn‐Teller material
Author(s) -
Gehring G. A.,
Laugsch J.
Publication year - 1976
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.2220780120
Subject(s) - brillouin zone , diagonal , jahn–teller effect , ion , phonon , rare earth , condensed matter physics , tight binding , phase transition , crystal (programming language) , phase (matter) , physics , molecular physics , materials science , chemistry , quantum mechanics , mineralogy , electronic structure , geometry , mathematics , computer science , programming language
The theory of optical side‐bands is developed for a crystal with a cooperative Jahn‐Teller phase transition containing rare‐earth ions. A tight binding scheme is used to describe the rare‐earth energy levels over the whole Brillouin zone. The possible two‐ion couplings which can give rise to side‐bands are discussed; these include the diagonal and off‐diagonal contributions of the virtual phonon interaction.