Electrical and Dielectric Properties of Nanoisland Systems Below Percolation Threshold

Abstract

Electric and dielectric properties of nanoisland metal films were studied in this work. Permittivity of these films was determined from the analysis of the dependences of the susceptance of the films. It is found that the effective permittivity of the researched structures has abnormally high positive value (107-108). The temperature dependence of the permittivity of the films practically does not differ from the temperature dependence of the conductivity of these films. Such behavior of these dependences is possible, if the reasons for the change of permittivity and conductivity of the films with the temperature are of the same nature. With the growth of the electric field effective permittivity of the films decreases and the conductivity increases. The cause behind the high effective permittivity of the films is the island nature of these metal films, and it is associated with the polarization of the dipoles, formed by couples negatively and positively charged metal islands. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34818