Driven depinning of strongly disordered media and anisotropic mean-field limits.
Extended systems driven through strong disorder are modeled generically using coarse-grained degrees of freedom that interact elastically in the directions parallel to the drive and slip along at least one of the directions transverse to the motion. In the limit of infinite-range elastic and viscous coupling this model has a tricritical point separating a region where the depinning is continuous, in the universality class of elastic depinning, from a region where depinning is hysteretic. Many of the collective transport models discussed in the literature are special cases of the generic model.
Marchetti
M Cristina
MC
Physics Department, Syracuse University, Syracuse, New York 13244, USA.
Middleton
A Alan
AA
Saunders
Karl
K
Schwarz
J M
JM