RESONANCE SCATTERING OF ELECTRONS IN Ag2Te AT LOW TEMPERATURE

It were investigated that the temperature dependencies of electric conductivity sigma and Hall coefficient R of p-Ag2Te in 4.2~200 K temperature is in interval for acceptor concentration Na < =6x1016 cm-3. The minimum sigma(T) were observed for all samples in ~50-80 K temperature interval. It was observed that the deeper of minimum is increased with Na decrease. It was shown that the part resonance scattering of electrons in minimum of sigma(T) and maximum of |alphan(T)| region is 16-18%. Temperature relationships of electric conduction sigma, Hall coefficient R, and thermoelectric power alpha0 in p-Ag2Te over a 4.2~200 K temperature interval Na < =6x1016 cm-3 have been studied. The minimum sigma(T) over a temperature interval between ~50-80 K is observed on all samples. It is found that the depth of minimum sigma(T) increases with decreasing Na. It is demonstrated that a contribution of resonance scattering of electrons in the area of minimum sigma(T) and maximum |alphan(T)| is 16-18%.