%0 Journal Article
%A Carpio Rodríguez, Ana María
%A Bonilla, Luis L.
%A Luzón, Ana
%T Effects of disorder on the wave front depinning transition in spatially discrete systems
%D 2002
%@ 1539-3755
%U https://hdl.handle.net/20.500.14352/57210
%X Pinning and depinning of wave fronts are ubiquitous features of spatially discrete systems describing a host of phenomena in physics, biology, etc. A large class of discrete systems is described by overdamped chains of nonlinear oscillators with nearest- neighbor coupling and subject to random external forces. The presence of weak randomness shrinks the pinning interval and it changes the critical exponent of the wave front depinning transition from 1/2 to 3/2. This effect is derived by means of a recent asymptotic theory of the depinning transition, extended to discrete drift-diffusion models of transport in semiconductor superlattices and is confirmed by numerical calculations.
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