He. Nilsson et M. Hjelm, Monte Carlo simulation of electron transport in 2H-SiC using a three valley analytical conduction band model, J APPL PHYS, 86(11), 1999, pp. 6230-6233
A Monte Carlo study of the electron transport in 2H-SiC is presented. The s
tudy is based on a three valley analytical band model that has been derived
from an ab initio band structure calculation. The scattering models have b
een extrapolated from recent Monte Carlo simulations of 4H-SiC and 6H-SiC.
The low field mobility in the c-axis direction is higher than in 4H-SiC and
6H-SiC, while the mobility perpendicular to the c axis is similar. The sat
uration velocity at 300 K obtained from the Monte Carlo simulation is 2.3 x
10(7) cm/s for field applied in the c-axis direction and 1.9 x 10(7) cm/s
for field applied perpendicular to the c-axis direction. The difference in
mean energy as a function of electric field between 2H-SiC and 4H-SiC or 6H
-SiC is large. The energy spectrum along the c axis in 2H-SiC is not discon
tinuous as in the case of 4H-SiC and 6H-SiC, which gives 2H-SiC a higher me
an energy for electric fields applied in the c-axis direction. This indicat
es that the electron impact ionization coefficients should be higher for 2H
-SiC. (C) 1999 American Institute of Physics. [S0021-8979(99)09522-5].