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- W2010490422 abstract "The temperature dependence of the optical absorptions involving orbital dublets (Eg) split by dynamic Jahn-Teller effect (JTE) (measured on AgCl and AgBr doped with Ti3+, Fe2+, and Cr2+) is discussed. From the results obtained for excited Eg states the linear JT-coupling parameters and the frequencies of the JT-active ϵGg mode are derived. These ϵg modes are found to be localized around the impurity ion. It is shown that the small and temperature independent oscillator strength of the transition between the JT-splitting levels of the Eg ground state (measured on Cr2+) is a consequence of the action of the dynamic JTE. The weak increase of the JT-splitting ΔE of the Eg ground state with increasing temperature is caused by the temperature dependence of the frequency of the ϵg mode following from the thermal expansion of the crystal.Die Temperaturabhangigkeit der optischen Absorptionen zu und zwischen durch dynamischen Jahn-Teller-Effekt (JTE) aufgepaltenen Bahndublettzustanden Eg (gemessen an AgCl und AgBr dotiert mit Ti3+, Fe2+ und Cr2+) wird diskutiert. Fur den Fall angeregter Eg-Zustande werden die linearen JT-Kopplungsparameter und die Frequenzen der JT-aktiven ϵg-Schwingungen bestimmt, die sich als lokalisierte Schwingungen erweisen. Es wird gezeigt, das die kleine und temperaturunabhangige Oszillatorenstarke des Uber-gangs zwischen den JT-Aufspaltungszustanden des Eg-Grundzustands (gemessen am Cr2+) eine Folge des Wirkens des dynamischen JTE ist. Die in diesem Fall gemessene schwache Vergroserung der JT-Aufspaltung ΔE mit steigender Temperatur wird durch die Temperaturabhangigkeit der Frequenz der ϵg-Schwingung als Folge der thermischen Ausdehnung des Kristalls erklart." @default.
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- W2010490422 date "1972-05-01" @default.
- W2010490422 modified "2023-09-25" @default.
- W2010490422 title "Jahn-Teller Effect on Transition Metal Ions in Silver Halides III. Interpretation" @default.
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- W2010490422 doi "https://doi.org/10.1002/pssb.2220510112" @default.
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