Abstract
We present a study of the dynamics and structural changes for -1,2-dichloroethylene between high- and low-density liquids using neutron-scattering techniques (diffraction, small-angle neutron scattering, and time of flight spectroscopy) and molecular-dynamics simulations. We show that changes in the short-range ordering of molecules goes along with a change in the molecular dynamics: both structure and dynamics of the high-density liquid are more cooperative than those of the low-density liquid. The microscopic mechanism underlying the cooperative motions in the high-density liquid has been found to be related to the backscattering of molecules due to a strong correlation of molecular ordering.
- Received 16 November 2009
- Corrected 18 March 2010
DOI:https://doi.org/10.1103/PhysRevB.81.092202
©2010 American Physical Society
Corrections
18 March 2010