4 papers
Dynamics of a ferromagnetic domain wall: avalanches, depinning transition and the Barkhausen effect
Stefano Zapperi, Pierre Cizeau, Gianfranco Durin +1
We study the dynamics of a ferromagnetic domain wall driven by an external magnetic field through a disordered medium. The avalanche-like motion of the domain walls between pinned…
Self-organized branching processes: Avalanche models with dissipation
Kent Bækgaard Lauritsen, Stefano Zapperi, H. Eugene Stanley
We explore in the mean-field approximation the robustness with respect to dissipation of self-organized criticality in sandpile models. To this end, we generalize a recently introd…
Self-Organized Branching Processes: A Mean-Field Theory for Avalanches
Stefano Zapperi, Kent Baekgaard Lauritsen, H. Eugene Stanley
We discuss mean-field theories for self-organized criticality and the connection with the general theory of branching processes. We point out that the nature of the self-organizati…
Sandpile Model on Sierpinski Gasket Fractal
Brigita Kutjnak-Urbanc, Stefano Zapperi, Sava Milošević +1
We investigate the sandpile model on the two--dimensional Sierpinski gasket fractal. We find that the model displays novel critical behavior, and we analyze the distribution functi…