Elastic Properties of Taurine Single Crystals Studied by Brillouin Spectroscopy

Abstract

The inelastic interaction between the incident photons and acoustic phonons in the taurine single crystal was investigated by using Brillouin spectroscopy. Three acoustic phonons propagating along the crystallographic b-axis were investigated over a temperature range of −185 to 175 °C. The temperature dependences of the sound velocity, the acoustic absorption coefficient, and the elastic constants were determined for the first time. The elastic behaviors could be explained based on normal lattice anharmonicity. No evidence for the structural phase transition was observed, consistent with previous structural studies. The birefringence in the ac-plane indirectly estimated from the split longitudinal acoustic modes was consistent with one theoretical calculation by using the extrapolation of the measured dielectric functions in the infrared range.

100th Anniversary of Brillouin Scattering: Impact on Materials Science

“…Nowadays, Brillouin scattering is extensively used in the studies of various kinds of materials such as gases [ 31 ], colloids [ 34 ], multilayers [ 35 ], ceramics [ 36 ], amino acids [ 37 ], biological tissues [ 38 , 39 ], insects [ 40 ], and fossils [ 41 ]. Brillouin scattering has been also used as inelastic light scattering in the gigahertz range for the investigations of various elementary excitations, not only for the acoustic phonon, but also the magnon [ 42 , 43 ], fracton [ 44 ], roton [ 45 ], ripplon [ 46 ], and soliton [ 31 ] have been studied.…”

Electron and Photon Interactions with Bio (Related) Molecules

“…The results show that the RNP complex faces some structural rearrangements in the Cas9 protein. Brillouin spectroscopy was employed to determine the elastic properties of taurine crystals [ 20 ]. Identification and temperature dependence from 175 °C to −170 °C of the longitudinal and transverse acoustic modes have been shown.…”