26
G. Chandra Ghivela and J. Sengupta
Table 1
Parameters of materials
Material
A
n
(×10 10
m −1
)
B
n
(×10 9
V
m −1
)
A
p
(×10 8
m −1
)
B
p
(×10 9
V
m −1
)
V
ns
(×10 5
ms −1
)
V
ps
(×10 5
ms −1
)
Si
0.038
0.175
22.5
0.326
1
0.75
GaAS
0.002
0.068
0.28
0.068
0.8
0.8
Ge
0.155
0.153
1
0.128
0.6
1