@article{oai:niigata-u.repo.nii.ac.jp:00002554,
 author = {Takeno, Shozo and Goda, Masaki},
 issue = {5},
 journal = {Progress of theoretical physics, Progress of theoretical physics},
 month = {Nov},
 note = {It is shown that an extra phonon density of states associated with the roton-like part of the dispersion of phonon excitations, which is likely to exist in almost all types of noncrystalline solids, gives rise to an excess low-temperature specific heat. This could account for the anomaly in the low-temperature thermal properties observed in a large number of noncrystalline solids and glassy polymers. It is shown that under certain conditions the excess low-temperature specific heat is nearly proportional to absolute temperature.},
 pages = {1468--1473},
 title = {Frequency Spectrum and Low-Temperature Specific Heat of Noncrystalline Solids},
 volume = {48},
 year = {1972}
}