1/3/2004
36
0<t<t
d
t=t
d
Evolution of current distribution during
t
d
l
t=0
Current flows on sample edges in strip
of width
l
i
=w
I/2I*
l
0<t<
t
d
Current penetrates into sample as ordered regions nucleate
l
t=t
d
First channel forms
*
t=0
J=J
c
dis
w
J=0
z
no
drive
J=J*
z
driven