TRANSPORT PROPERTY SIMULATION OF P-TYPE BETA-FESI2

Estimations of mobility versus temperature for semiconducting iron dis ilicide in relaxation time approximation have been performed. The resu lts obtained have shown the influence of polar optical phonon scatteri ng to be negligible. A power-law temperature dependence T-beta with be ta > 3/2 in the high-temperature region can be obtained due to acousti c and nonpolar phonon scatterings. The power of the exponent is strict ly affected by neutral impurity scattering as well which, in our opini on, may be connected with the crystalline purity.