Stress‐Induced Alignment of Jahn‐Teller Centres Cr 2+  in ZnSe Crystals. Optical Study | Zendy

Ryskin A. I. | Zendy; Vasilev A. V. | Zendy; Natadze A. L. | Zendy

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Stress‐Induced Alignment of Jahn‐Teller Centres Cr 2+ in ZnSe Crystals. Optical Study

Author(s) -

Ryskin A. I.,

Vasilev A. V.,

Natadze A. L.

Publication year - 1979

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.2220930202

Subject(s) - impurity , jahn–teller effect , materials science , condensed matter physics , ion , phonon , crystallography , spectral line , stress (linguistics) , absorption spectroscopy , crystal twinning , optics , chemistry , physics , microstructure , linguistics , philosophy , organic chemistry , astronomy

Uniaxial compression of ZnSe–Cr crystals along the fourth‐order axis results in shift and splitting of the zero‐phonon lines of the absorption band, connected with the 5 B̂ 2 ( 5 T 2 ) → ( 5 Â 1 + 5 B̂ 1 ) ( 5 E) transition of the impurity Cr 2+ ions, and in dichroism, which is caused by the reorientation of the Jahn‐Teller centres Cr 2+ along the stress direction. Spectra of stressed crystals are calculated on the base of the exchange‐charge model. In imperfect (twinned) ZnSe crystals two types of Cr 2+ centres are observed. These centres are identified as Cr 2+ ions in the interlayers of a twin structure.

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