Hysteresis and Noise in Stripe and Clump Forming Systems
arXiv:cond-mat/0503261 · doi:10.1209/epl/i2005-10250-8
Abstract
We use simulations to examine hysteresis and noise in a model system that produces heterogeneous orderings including stripe and clump phases. In the presence of a disordered substrate, these heterogeneous phases exhibit 1/f$^α$ noise and hysteresis in transport. The noise fluctuations are maximal in the heterogeneous phases, while in the uniform phases the hysteresis vanishes and both $α$ and the noise power decrease. We compare our results to recent experiments exhibiting noise and hysteresis in high-temperature superconductors where charge heterogeneities may occur.
4 pages, 5 postscript figures