The Effect of the Three Phonon Scattering on the Phonon Drag Thermoelectric Power of As and Sb-Doped Ge PDF

Keywords

thermoelectric, phonon, temperature

Abstract

The effect of the three phonon scattering on the phonon drag thermoelectric power of As and Sb doped Ge has been studied in the temperature range 2-20 K. At very low temperatures, it is found that the effect of the Umklapp processes are very small and can be ignored while the Normal processes are in a good agreement with the calculated values up to 10K. Above 10K both kinds of scatterings should be included in the calculations. The study has shown that the most important scattering mechanisms in such samples are the electron-phonon and the point-defects scatterings.