Electron-phonon Coupling in the 4T2g Excited Electron State of Cs2GeF6:Mn4+

Autor:	N. M. Avram, M. G. Brika
Rok vydání:	2005
Předmět:	Crystal Coupling constant Octahedron Normal mode Chemistry Jahn–Teller effect Excited state Potential energy surface General Physics and Astronomy Physical and Theoretical Chemistry Atomic physics Mathematical Physics Ion
Zdroj:	Zeitschrift für Naturforschung A. 60:54-60
ISSN:	1865-7109 0932-0784
DOI:	10.1515/zna-2005-1-209
Popis:	In the present paper we report on an analysis of the fine structure of the first excited quartet 4T2g of Mn4+ ions which occupy the octahedral site in the Cs2GeF6 host crystal. The dynamic 4T2g⊗(eg+t2g) Jahn-Teller effect is considered in details, including the Ham effect of the reduction of the spin-orbit splitting and displacements of the ligands due to the combined effect of the a1g and eg normal modes of the [MnF6]2− octahedral complex. The electron-phonon coupling constants are evaluated using the experimental spectroscopic data. The value of the Jahn-Teller stabilization energy EJT = 438 cm−1 for the considered complex is estimated from both the Ham effect and the potential energy surface of the 4T2g excited state.
Databáze:	OpenAIRE
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