Numéro |
J. Phys. II France
Volume 2, Numéro 8, August 1992
|
|
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Page(s) | 1483 - 1488 | |
DOI | https://doi.org/10.1051/jp2:1992214 |
DOI: 10.1051/jp2:1992214
J. Phys. II France 2 (1992) 1483-1488
1 Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, D-5000 Köln 41, Germany
2 Theoretische Physik III, Ruhr-Universität Bochum, Postfach 102148, D-4630 Bochum, Germany
64.60A - 47.55M - 75.10N - 75.60
© Les Editions de Physique 1992
J. Phys. II France 2 (1992) 1483-1488
Dynamics of interface depinning in a disordered medium
Thomas Nattermann1, Semjon Stepanow1, Lei-Han Tang1 and Heiko Leschhorn21 Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, D-5000 Köln 41, Germany
2 Theoretische Physik III, Ruhr-Universität Bochum, Postfach 102148, D-4630 Bochum, Germany
(Received 16 June 1992, accepted 22 June 1992)
Abstract
The dynamics of a driven interface in a disordered medium close to the depinning threshold is analyzed. By a functional renormalization
group scheme exponents characterizing the depinning transition are obtained to the first order in
, where
D is the interface dimension. At the transition, the dynamics is superdiffusive with a dynamical exponent
, and the interface height difference over a distance
L grows as
with
. The interface velocity in the moving phase vanishes as
with
when the driving force
F approaches its threshold value
.
64.60A - 47.55M - 75.10N - 75.60
© Les Editions de Physique 1992