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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

cond-mat.dis-nnarXiv:cond-mat/9812122

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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