Infrared vibrational spectra of amorphous Si and Ge
- 15 February 1974
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 9 (4), 1646-1651
- https://doi.org/10.1103/physrevb.9.1646
Abstract
We report the observation of the room-temperature infrared absorption spectrum of sputtered films of amorphous Si and Ge between 35 and 700 . The spectra show a broad frequency range of absorption corresponding to the frequency range of the vibrational density of states in crystalline Si and Ge. We interpret the results in terms of a disorder-induced breakdown of the selection rules for vibronic infrared absorption in much the same way as occurs in Raman scattering. Discussion is given of related phenomena in alloys and neutron-irradiated crystals.
Keywords
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