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Onsager model for a variable dielectric permittivity near an interface

Reimar Finken, Vincent Ballenegger, Jean-Pierre Hansen

cond-mat.softarXiv:cond-mat/0304087

Abstract

Using a generalisation of an Onsager type approach, we are able to predict a dielectric permittivity profile of an inhomogeneous dipolar fluid in the presence of a dielectric interface. The reaction and cavity fields are calculated semi-analytically using bispherical coordinates. An asymptotic expression for the local permittivity is derived as a function of distance from the interface.

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