Pinning of interfaces in a random elastic medium and logarithmic lattice embeddings in percolation

TL;DR

This paper demonstrates the existence of a stationary interface in a random elastic medium under non-zero driving force, revealing hysteresis phenomena, and establishes a percolation result related to embedding logarithmic functions in clusters.

Contribution

It proves the existence of stationary supersolutions in a driven elastic interface model and introduces a novel percolation embedding result for logarithmic functions.

Findings

Existence of stationary supersolutions at non-zero force

Hysteresis emerges from obstacle interactions

Embedding of logarithmic functions in percolation clusters

Abstract

For a model of a driven interface in an elastic medium with random obstacles we prove existence of a stationary positive supersolution at non-vanishing driving force. This shows the emergence of a rate independent hysteresis through the interaction of the interface with the obstacles, despite a linear (force=velocity) microscopic kinetic relation. We also prove a percolation result, namely the possibility to embed the graph of an only logarithmically growing function in a next-nearest neighbor site-percolation cluster at a non-trivial percolation threshold.