High Tc metal oxide as Mott-Hubbard unstable paraelectric: General properties of density-mobility dependence

Coupling with large quasi momenta and presence of carriers of different signs of the effective mass, which are the main features of the high-Tc superconductivity mechanism developed recently by Kopaev et al., have found the experimental evidence in our previous works. It has been shown that dc resistivity and Hall effect temperature behaviour can be explained by the model of the paraelectric close to the point of the Mott-Hubbard instability. This model possesses the above-mentioned characteristic features. Here we consider in more details the properties of the density-mobility dependence in such Mott-Hubbard unstable systems in general form and show that it reveals some common general features important for considerations of transport properties