Microscopic structure and dynamics of high and low density trans-1,2-dichloroethylene liquids

Details Microscopic structure and dynamics of high and low density trans-1,2-dichloroethylene liquids Microscopic structure and dynamics of high and low density trans-1,2-dichloroethylene liquids

2010-02-15

arxiv.org/abs/1002.2956v1

Physics

Condensed Matter

Other Condensed Matter

5 pages and 3 figures. To be published in Physical Review B

Scientific paper

We present a study of the dynamics and structural changes for trans-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 of 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.

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