Orientational Relaxation in a Random Dipolar Lattice: Role of Spatial Density Fluctuations in Supercooled Liquids

S. Ravichandran and Biman Bagchi
Phys. Rev. Lett. 76, 644 – Published 22 January 1996
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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.

  • Received 25 August 1995

DOI:https://doi.org/10.1103/PhysRevLett.76.644

©1996 American Physical Society

Authors & Affiliations

S. Ravichandran and Biman Bagchi

  • Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India

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Vol. 76, Iss. 4 — 22 January 1996

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