Consider ZnO with the c-axis along x 3 . For antiplane problems, the governing
equations are from Eqs. (1.42), (1.37), (1.36), and (1.39):
∇
2 Δp À Δn
ð
Þ¼k
2
Δp À Δn
ð
Þ ,
ð2:22Þ
Àε∇
2 φ ¼ q Δp À Δn
ð
Þ
ð 2:23Þ
Fig. 2.5 (a) Electric field.
(b) Electric Potential
2.3 Circular PN Junction
19
equations are from Eqs. (1.42), (1.37), (1.36), and (1.39):
∇
2 Δp À Δn
ð
Þ¼k
2
Δp À Δn
ð
Þ ,
ð2:22Þ
Àε∇
2 φ ¼ q Δp À Δn
ð
Þ
ð 2:23Þ
Fig. 2.5 (a) Electric field.
(b) Electric Potential
2.3 Circular PN Junction
19