Hysteresis and Noise in Stripe and Clump Forming Systems

摘要

We use simulations to examine hysteresis and noise in a model system thatproduces heterogeneous orderings including stripe and clump phases. In thepresence of a disordered substrate, these heterogeneous phases exhibit1/f$^\alpha$ noise and hysteresis in transport. The noise fluctuations aremaximal in the heterogeneous phases, while in the uniform phases the hysteresisvanishes and both $\alpha$ and the noise power decrease. We compare our resultsto recent experiments exhibiting noise and hysteresis in high-temperaturesuperconductors where charge heterogeneities may occur.