TY - JOUR
A1 - Díaz Sánchez, Anastasio
AU - Pérez Garrido, Antonio
AU - Urbina Yeregui, Antonio
AU - Catalá Galindo, José Damián
T1 - Stretched exponential relaxation for growing interfaces in quenched disordered media
Y1 - 2002
SN - 1550-235X
UR - http://arxiv.org/abs/cond-mat/0206545
UR - http://hdl.handle.net/10317/581
AB - We study the relaxation for growing interfaces in quenched disordered media. We use a directed percolation depinning model introduced by Tang and Leschhorn for 1+1-dimensions. We define the two-time autocorrelation function of the interface height C(t′, t) and its Fourier transform. These functions depend on the difference of times t−t′ for long enough times, this is the steady-state regime.
We find a two-step relaxation decay in this regime. The long time tail can be fitted by a stretched exponential relaxation function. The relaxation time is proportional to the characteristic distance of the clusters of pinning cells in the direction parallel to the interface and it diverges as a power law.
The two-step relaxation is lost at a given wave length of the Fourier transform, which is proportional to the characteristic distance of the clusters of pinning cells in the direction perpendicular to the
interface. The stretched exponential relaxation is caused by the existence of clusters of pinning cells and it is a direct consequence of the quenched noise.
KW - Función de autocorrelación de dos tiempos
KW - Transformación de Fourier
KW - Física Aplicada
LA - eng
PB - American Physical Society
ER -