Molecular theory of underdamped dielectric relaxation: understanding collective effects in dipolar liquids

Bagchi, B and Chandra, A (1993) Molecular theory of underdamped dielectric relaxation: understanding collective effects in dipolar liquids. In: Chemical Physics, 173 (2). pp. 133-141.

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Abstract

A molecular theory of underdamped dielectric relaxation of a dense dipolar liquid is presented. This theory properly takes into account the collective effects that are present (due to strong intermolecular correlations) in a dipolar liquid. For small rigid molecules, the theory again leads to a three-variable description which, however, is somewhat different from the traditional version. In particular, two of the three parameters are collective in nature and are determined by the orientational pair correlation function. A detailed comparison between the theory and the computer simulation results of Neria and Nitzan is performed and an excellent agreement is obtained without the use of any adjustable or free parameter - the calculation is fully microscopic. The theory can also provide a systematic description of the Poley absorption often observed in dipolar liquids in the high-frequency regime.

Item Type:	Journal Article
Publication:	Chemical Physics
Publisher:	Elsevier Science
Additional Information:	Copyright of this article belongs to Elsevier Science.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	17 Feb 2011 06:28
Last Modified:	17 Feb 2011 06:28
URI:	http://eprints.iisc.ac.in/id/eprint/35623

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