Effects of Nonparabolicity on Electron Thermopower of Size-Quantized Semiconductor Films
BAHSHELI Guliyev1, AKBAR Barati Chiyaneh2**, NOVRUZ Bashirov3, GENBER Kerimli4
1Baku State University, Department of Physics, Baku, Azerbaijan 2Yüzüncü Y?l University, Department of Mathematics, Van 65080, Turkey 3Yüzüncü Y?l University, Health Occupation High School, Van 65080, Turkey 4I?d?r University, Departments of Electrical and Electronic Engineering, I?d?r, Turkey
Abstract：Effects of nonparabolicity of energy band on thermopower, in-plane effective mass and Fermi energy are investigated in size-quantized semiconductor films in a strong while non-quantized magnetic field. We obtain the expressions of these quantities as functions of thickness, concentration and nonparabolicity parameter. The influence of nonparabolicity is studied for degenerate and non-degenerate electron gases, and it is shown that nonparabolicity changes the character of thickness and the concentration dependence of thermopower, in-plane effective mass and Fermi energy. Moreover, the magnitudes of these quantities significantly increase with respect to the nonparabolicity parameter in the case of strong nonparabolicity in nano-films. The concentration dependence is also studied, and it is shown that thermopower increases when the concentration decreases. These results are in agreement with the experimental data.
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2015, Vol. 32 
