Charge transport in Si-SiO$_2$ and Si-TiO$_2$ nanocomposite structures

The experimental data on dispersed Si-SiO$_2$ and Si-TiO$_2$ nanocomposite structures different in terms of physical, chemical, and insulator properties of oxide components are reported. The parameters of the nanocomposite structures are studied by FTIR spectroscopy and impedance spectroscopy. It is shown that, in such structures, the mechanisms of charge-carrier transport are defined by the properties of Si nanocrystallites and the corresponding oxide as well as by interaction processes at interfaces between grains.