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Vibronic Spectra and the Dynamic Jahn‐Teller Effect of Cubic ZnS:Cu 2+
Author(s) -
Maier H.,
Scherz U.
Publication year - 1974
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.2220620115
Subject(s) - jahn–teller effect , vibronic coupling , lattice (music) , vibronic spectroscopy , phonon , ion , atomic physics , spectral line , absorption spectroscopy , ground state , luminescence , physics , condensed matter physics , chemistry , molecular physics , quantum mechanics , excited state , optics , acoustics
Near infrared absorption and emission spectra due to the transitions 2 T 2 ↔ 2 E of the Cu 2+ ion in cubic ZnS have been measured at 4K. The distinct vibronic sidebands of the absorption spectrum exactly correspond to various critical point energies of TA, TO, and LO lattice modes, whereas the structure of the luminescence spectrum cannot be interpreted in terms of lattice phonon satellites. A dynamic Jahn‐Teller interaction in the 2 T 2 ground state being in the same order of magnitude as static lattice spin‐orbit splitting and phonon energy is shown to produce this deviation from the mirror symmetry. Weak and strong coupling approximations in the cluster limit have been extended to include vibronic states with up to six E‐modes.