(a)
(b)
Figure 4:
Behavior of
𝑉
s
a
t
as function of (a)
𝑎
and (b)
𝛿
. After a power law fitting we obtain that
𝛼
1
=
0
.
2
9
9
±
0
.
0
0
3
and
𝛼
2
=
(
0
.
7
4
7
±
0
.
0
0
7
)
≅
3
/
4
.
