EFFECT OF QUANTUM SCREENING ON THE LOW-FIELD LONGITUDINAL MOBILITY INN-INSB IN THE EXTREME QUANTUM LIMIT AT LOW-TEMPERATURES

The effect of quantum screening on the magnetic field dependence of lo w field longitudinal mobility has been studied in the extreme quantum limit (EQL) in n-InSb at low temperatures to interpret the experimenta l results in n-InSb. The calculation of the low temperature mobility i n the EQL includes the various scattering mechanisms which are dominan t at low temperatures and other complexities such as band nonparabolic ity, and non-equipartition of phonons. The effect of quantum screening , arising due to the quantum nature of electron gas in the presence of a quantizing magnetic field, has been included. The variation of mobi lity as a function of magnetic field and temperature has been studied in n-InSb both for classical and quantum screening. The theoretical re sults have been compared with the experimental results in n-InSb. The inclusion of quantum screening has been found to reduce the mobility c ompared to the mobility obtained with the classical screening and the results for the quantum screening is found to be closer to the experim ental results. Hence, the inclusion of quantum screening improves the theoretical results.