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- W3046002612 abstract "For the first time, large single crystals of the simplest amino acid, glycine, have been used to determine the temperature dependence of its terahertz spectrum. High-quality spectra with very sharp absorption features are observed at cryogenic temperatures. The α-glycine structure and the purity of the crystals were verified via Raman spectroscopy and X-ray diffraction. Spectral redshift with increasing temperature was observed for all absorption bands in the terahertz region (10-250 cm-1, or 1-8 THz) over the temperature range of 20-300 K. X-ray diffraction revealed expansion in all planes of the crystal lattice over the same temperature range. A Bose-Einstein distribution was used to model the frequency position shift of the two lowest-energy fundamental modes at 50 cm-1 and 69 cm-1. On this basis, we attribute the observed redshift and broadening with increasing temperature to the anharmonic potential associated with the phonon bath." @default.
- W3046002612 created "2020-08-03" @default.
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- W3046002612 date "2021-01-01" @default.
- W3046002612 modified "2023-10-18" @default.
- W3046002612 title "Anharmonicity-driven redshift and broadening of sharp terahertz features of α-glycine single crystal from 20 K to 300 K: Theory and experiment" @default.
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- W3046002612 doi "https://doi.org/10.1016/j.saa.2020.118635" @default.
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