The peculiarities of the electrical and thermoelectrical properties of p-type $Ag_2Te$

Özet

The electrical and thermoelectrical properties of p-type $Ag_2Te$ have been investigated. Various peculiarities were observed: the minimum (at $T \approx 65 K$) and maximum (at $T \approx 200 K$) on the temperature dependence of conductivity $\sigma(T)$; the weak dependence of Hall coefficient R(T) (in 200-300 K range) and the maximum (at $T \approx 100 K$ and 250 K) on the temperature dependence of thermal power $\alpha_0 (T)$. The investigation results were interpreted by two-bands model. It is shown that mentioned peculiarities have been stimulated by the narrow gap of $Ag_2Te$ and its temperature dependence.