shown, which is sufficient for examining the fields of interest because they are local,
and near x ¼ Æ1 μm, they have already stablized. Near the ends of the rod at far away
where x ¼ ÆL, there exist edge effects that cannot be seen in the figure. When F ¼ 0,
the corresponding curves are either symmetric or antisymmetric about the origin.
When F is nonzero, the curves lose their symmetry or antisymmetry. Although the
built-in voltage determined by the potential difference at x ¼ Æ1 μm in (a) is
essentially unaffected by F, the slope of the potential field or the built-in electric
field in (b) is affected. When F ¼ 0.2 MPa, the potential in (a) is continuous but
nonsmooth at the origin. This is related to that the corresponding electric field in
(b) has a jump dicontinuity at the origin which has been connected by a vertical line
in the figure.
Fig. 3.27 Effects of a small
F ¼ 0–0.2 MPa on
polarization. (a)
Homogeneous junction. (b)
Heterogeneous junction
80
3 Extension of Rods
and near x ¼ Æ1 μm, they have already stablized. Near the ends of the rod at far away
where x ¼ ÆL, there exist edge effects that cannot be seen in the figure. When F ¼ 0,
the corresponding curves are either symmetric or antisymmetric about the origin.
When F is nonzero, the curves lose their symmetry or antisymmetry. Although the
built-in voltage determined by the potential difference at x ¼ Æ1 μm in (a) is
essentially unaffected by F, the slope of the potential field or the built-in electric
field in (b) is affected. When F ¼ 0.2 MPa, the potential in (a) is continuous but
nonsmooth at the origin. This is related to that the corresponding electric field in
(b) has a jump dicontinuity at the origin which has been connected by a vertical line
in the figure.
Fig. 3.27 Effects of a small
F ¼ 0–0.2 MPa on
polarization. (a)
Homogeneous junction. (b)
Heterogeneous junction
80
3 Extension of Rods