Models of plastic depinning of driven disordered systems |
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Authors: | M Cristina Marchetti |
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Institution: | (1) Physics Department, Syracuse University, 13244 Syracuse, NY, USA |
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Abstract: | Two classes of models of driven disordered systems that exhibit historydependent dynamics are discussed. The first class incorporates
local inertia in the dynamics via nonmonotonic stress transfer between adjacent degrees of freedom. The second class allows
for proliferation of topological defects due to the interplay of strong disorder and drive. In mean field theory both models
exhibit a tricritical point as a function of disorder strength. At weak disorder depinning is continuous and the sliding state
is unique. At strong disorder depinning is discontinuous and hysteretic. |
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Keywords: | Collective transport depinning disorder plasticity |
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