On a biphononic origin of the 1125 cm(-1) absorption band in cuprous oxide
V. M. Burlakov, M. Goeppert, A. Jolk, A. Dinger, R. Becker, C. F. Klingshirn
Abstract
We report on the IR spectroscopic studies in both reflection (50-900 cm-1) and transmission (900-3000 cm-1) mode of the vibration spectrum of the cuprous oxide. A detailed analysis based on a comparison of the temperature dependences of the absorption band at 1125 cm-1 and of IR and Raman active fundamental vibrations results in assignment of the former to a biphonon.
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