Publication
Physical Review B
Paper

Infrared vibrational spectra of amorphous Si and Ge

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Abstract

We report the observation of the room-temperature infrared absorption spectrum of sputtered films of amorphous Si and Ge between 35 and 700 cm-1. 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. © 1974 The American Physical Society.

Date

15 Feb 1974

Publication

Physical Review B

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