Journal of Theoretical and Computational Studies
EFFECT OF VARIOUS MATERIAL PARAMETERS ON THE CALCULATED VELOCITY-FIELD RELATION IN AL0.2GA0.8N AT ROOM TEMPERATURE
H. Arabshahi and A. Farzaneh
Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran
Department of Physics, Tarbiat Moallem University of Sabzevar, Iran
The results of an ensemble Monte Carlo simulation of the steady-state electron drift velocity as a function of applied electric ﬁeld in Al0.2Ga0.8N are presented. The eﬀect of various material parameters on the calculated velocity is assessed by varying each parameter independently by ▒30It is found that both the optical phonon energy and intervalley separation energy alter the peak electron velocity. Variations in the dielectric constants and central valley eﬀective mass have more eﬀect upon the peak drift velocity and act to alter the threshold electric ﬁeld. The combined eﬀects of a greater central valley eﬀective mass and a larger phonon energy in Al0.2Ga0.8N result in a greater threshold ﬁeld.