Translation-rotation coupling in transient grating experiments: Theoretical and experimental evidences
Year: 2001
Authors: Taschin A., Torre R., Ricci M., Sampoli M., Dreyfus C., Pick R.M.
Autors Affiliation: Univ Florence, LENS, I-50125 Florence, Italy; Univ Florence, Dipartimento Fis, I-50125 Florence, Italy; INFM, Unita Firenze, I-50125 Florence, Italy; Univ Basilicata, Dipartimento Chim Fis, I-85100 Potenza, Italy; Univ Florence, Dipartimento Energet, I-50125 Florence, Italy; Univ Paris 06, PMC, UMR 7602, F-75005 Paris, France; Univ Paris 06, LMDH, UMR 7603, F-75005 Paris, France.
Abstract: The results of a Transient Grating experiment in a supercooled molecular liquid of anisotropic molecules and its theoretical interpretation are presented. These results show the existence of two distinct dynamical contributions in the response function of this experiment, density and orientation dynamics. These dynamics can be experimentally disentangled by varying the polarisation of the probe and diffracted beams and they have been identified and measured in a Heterodyne Detected experiment performed on m-toluidine. The results of the theory show a good qualitative agreement with the measurements at all temperatures.
Journal/Review: EUROPHYSICS LETTERS
Volume: 56 (3) Pages from: 407 to: 413
KeyWords: Stimulated Thermal Scattering; Glass-forming Liquids; Light-scattering; Supercooled Liquids; Relaxation DynamicsDOI: 10.1209/epl/i2001-00533-6Citations: 31data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2024-10-20References taken from IsiWeb of Knowledge: (subscribers only)