title: Crossover behavior in interface depinning.
abstract: We study the crossover scaling behavior of the height-height correlation function in interface depinning in random media. We analyze experimental data from a fracture experiment and simulate an elastic line model with nonlinear couplings and disorder. Both exhibit a crossover between two different universality classes. For the experiment, we fit a functional form to the universal crossover scaling function. For the model, we vary the system size and the strength of the nonlinear term and describe the crossover between the two universality classes with a multiparameter scaling function. Our method provides a general strategy to extract scaling properties in depinning systems exhibiting crossover phenomena.
authors.affiliation: LASSP, Physics Department, Cornell University, Ithaca, New York 14853-2501, USA.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Chen
authors.affiliation: Center for Complexity and Biosystems, Department of Physics, University of Milano, via Celoria 26, 20133 Milano, Italy; CNR-Consiglio Nazionale delle Ricerche, IENI, Via R. Cozzi 53, 20125, Milano, Italy; ISI Foundation, Via Alassio 11/c 10126 Torino, Italy; and Department of Applied Physics, Aalto University, P.O. Box 14100, FIN-00076, Aalto, Finland.
authors.forename: Stefano
authors.initials: S
authors.lastname: Zapperi
authors.affiliation: LASSP, Physics Department, Cornell University, Ithaca, New York 14853-2501, USA.
authors.forename: James P
authors.initials: JP
authors.lastname: Sethna