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Dynamics below the Depinning Threshold in Disordered Elastic Systems

Krauth, Werner
Published in Physical Review Letters. 2006, vol. 97, no. 5
Abstract We study the steady-state low-temperature dynamics of an elastic line in a disordered medium below the depinning threshold. Analogously to the equilibrium dynamics, in the limit T→0, the steady state is dominated by a single configuration which is occupied with probability 1. We develop an exact algorithm to target this dominant configuration and to analyze its geometrical properties as a function of the driving force. The roughness exponent of the line at large scales is identical to the one at depinning. No length scale diverges in the steady-state regime as the depinning threshold is approached from below. We do find a divergent length, but it is associated only with the transient relaxation between metastable states.
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KOLTON, Alejandro et al. Dynamics below the Depinning Threshold in Disordered Elastic Systems. In: Physical Review Letters, 2006, vol. 97, n° 5. https://archive-ouverte.unige.ch/unige:36067

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Deposited on : 2014-04-28

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