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First‐order raman scattering of CsF doped with F centres
Author(s) -
Lefrant S.,
Buisson J. P.,
Ghomi M.,
Taurel L.
Publication year - 1978
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.2220860207
Subject(s) - raman spectroscopy , raman scattering , doping , ion , coupling (piping) , phonon , spectral line , atomic physics , resonance (particle physics) , condensed matter physics , electron , order (exchange) , physics , chemistry , materials science , optics , quantum mechanics , finance , economics , metallurgy
First‐order Raman spectra of CsF (F centres) studied in resonance with the F band (610 and 640 nm) at T = 10 K are described. The acoustic (43, 48, and 76 cm −1 ) and optical (135 and 137 cm −1 ) modes are due to electron‐phonon interactions involving the displacements of the first and second shells of the F centre neighbouring ions, respectively. The interpretation of the spectra needs to consider the breaking of the “usual” selection rules due to the spin‐orbit coupling in the first I 4 − orbital state of the F centre via the electron interactions with the Γ 1 + , Γ 3 + , and Γ 5 +phonons.