Document Type
Article
Publication Date
3-24-2021
Publication Title
Physical Chemistry Chemical Physics
Volume
23
Issue
14
First page number:
8792
Last page number:
8799
Abstract
Inelastic neutron scattering has been performed on para-terphenyl at temperatures from 10 to 200 K and under pressures from the ambient pressure to 1.51 kbar. The temperature dependence of phonons, especially low-frequency librational bands, indicates strong anharmonic phonon dynamics. The pressure- and temperature-dependence of the phonon modes suggest a lack of phase transition in the region of 0-1.51 kbar and 10-30 K. Additionally, the overall lattice dynamics remains similar up to 200 K under the ambient pressure. The results suggest that the boundary between the ordered triclinic phase and the third solid phase, reported at lower temperatures and higher pressures, is out of the pressure and temperature range of this study.
Keywords
Inelastic neutron scattering; Para-terphenyl; Phonons; Temperature dependence
Disciplines
Chemistry | Physical Sciences and Mathematics | Physics
File Format
File Size
1014 KB
Language
English
Repository Citation
Cai, Q.,
McIntire, M.,
Daemen, L. L.,
Li, C.,
Chronister, E.
(2021).
Pressure- and Temperature-Dependent Inelastic Neutron Scattering Study of the Phase Transition and Phonon Lattice Dynamics in Para-Terphenyl.
Physical Chemistry Chemical Physics, 23(14),
8792-8799.
http://dx.doi.org/10.1039/d1cp00190f