Specific features of Raman scattering in crystals with a cooperative Jahn–Teller effect

✍ Scribed by I. Stasyuk; Ya. Ivankiv

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 125 KB
• Volume: 30
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/(sici)1097-4555(199907)30:7<581::aid-jrs423>3.0.co;2-q

✦ Synopsis

A microscopic approach which permits Raman scattering in a dielectric crystal is presented to be described in a uniform way. Additional features of the temperature dependences in the spectrum of Raman scattering of phonons are obtained, arising owing to presence of low-lying nearly degenerated electronic levels typically occurring in crystals with Jahn-Teller phase transitions. The changes in the populations of these levels may influence the temperature dependences in Raman spectra. The theory describes also the electronic Raman effect in these crystals.