Anharmonic decay rates are calculated for a realistic atomic model of amorphous silicon. The results show that the vibrational states decay on picosecond timescales and follow the two-mode density of states, similar to crystalline silicon, but somewhat faster. Surprisingly little change occurs for localized states. These results disagree with a recent experiment.
@article{arxiv.cond-mat/9605101,
title = {Anharmonic Decay of Vibrational States in Amorphous Silicon},
author = {Jaroslav Fabian and Philip B. Allen},
journal= {arXiv preprint arXiv:cond-mat/9605101},
year = {2009}
}