Multiphonon optical bands of Cr3+ ion in sulphide spinels: A pseudo Jahn-Teller model

A. Al Haroun, L. L. Kulyuk, V. Yu Mirovitskii, A. N. Nateprov, A. V. Palii, V. E. Tezlevan, B. S. Tsukerblat

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations


In this article we report the adiabatic and dynamic solutions of the pseudo Jahn-Teller (JT) problem in the orbital triplet 4T2(t22e) of Cr3+ ion resulting from the combined effect of tetragonal (E) vibrations and trigonal crystal field in sulphide spinels lattice. We discuss the general properties of the adiabatic surfaces that give a clear qualitative insight on the main features of the optical bands. The shapes of the absorption bands are calculated on basis of the quantum-mechanical solution of the dynamic pseudo JT problem taking into account the effective electric-dipole moment involving odd-parity crystal field potential. Pseudo JT (4A1+4E)⊗e interaction is shown to produce a complicated structure of the multiphonon optical bands and leads to a specific polarization effect. Calculated shape function for the U-band absorption proves to be in a good agreement with the excitation spectrum of α - ZnAl2S4 tiospinel doped with chromium ions, the experimentally detected peculiarities of the structure of this band are shown to be an evidence of strong pseudo JT interaction in the excited state.

Original languageEnglish
Pages (from-to)248-260
Number of pages13
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 1 Jan 2002
Externally publishedYes
EventXI Feofilov Symposium on Spectoscopy of Crystals Activated by Rare-Earth and Transition Metal Ions - Kazan, Russian Federation
Duration: 24 Sep 200128 Sep 2001


  • Cr ion in spinels
  • Jahn-Teller effect
  • Multiphonon optical bands
  • Polarization effect
  • Vibronic interaction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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