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COLLECTIVE PINNING
Stiff Springs
z
Ordered lattice
z
Low
J
c
Soft Springs
z
Disordered
z
High
J
c
Size of coherent domain
R
c
~
x(
J
0
/J
c
)
1/2
A. I. Larkin andY. Ovchinikov - 79
U. Yaron et al - 94
Elastic Manifold
in Random Potential