Orientational Relaxation in a Random Dipolar Lattice: Role of Spatial Density Fluctuations in Supercooled Liquids
- 22 January 1996
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 76 (4) , 644-647
- https://doi.org/10.1103/physrevlett.76.644
Abstract
We have carried out a computer “experiment” of orientational relaxation in a spatially random and orientationally disordered dipolar lattice (RDL), generated by quenching only the translational motion of a dense liquid. In the high polarity limit, the orientational relaxation of the RDL is dramatically different from that of the parent liquid, the former exhibits a very slow, nonexponential long time decay of the orientational correlation functions and markedly non-Debye dielectric relaxation. These results clearly demonstrate the importance of spatial density fluctuations in orientational relaxation.Keywords
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