Effective dielectric response of composites containing uniaxial inclusions

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  • M. I. Vasilevskiy


Original languageEnglish
Pages (from-to)197-204
Journal / PublicationPhysica Status Solidi (B) Basic Research
Issue number1
Publication statusPublished - May 2000
Externally publishedYes


An approach is proposed for the calculation of an effective dielectric function for a composite medium containing randomly oriented particles with uniaxial polarisability (the medium is isotropic on average). A scalar renormalised average polarisability of the particles is introduced, which takes complete account of the tensor nature of the dipole-dipole interaction between them. Fluctuations originating from their random positions are treated in the spirit of the average T-matrix approximation. The renormalised polarisability is related to the effective dielectric function via the Maxwell-Garnett equation. The theory is illustrated by calculating the reflectivity and absorption of a colloidal solution of hexagonal CdS particles.