Europhys. Lett.
Volume 72, Number 3, November 2005
Page(s) 444 - 450
Section Condensed matter: electronic structure, electrical, magnetic, and optical properties
Published online 30 September 2005
Europhys. Lett., 72 (3), pp. 444-450 (2005)
DOI: 10.1209/epl/i2005-10250-8

Hysteresis and noise in stripe- and clump-forming systems

C. Reichhardt, C. J. Olson Reichhardt and A. R. Bishop

Center for Nonlinear Studies and Theoretical Division, Los Alamos National Laboratory Los Alamos, NM 87545, USA

received 25 July 2005; accepted 8 September 2005
published online 30 September 2005

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 $1/f^{\alpha}$ noise and hysteresis in transport. The noise fluctuations are maximal in the heterogeneous phases, while in the uniform phases the hysteresis vanishes and both $\alpha$ 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.

74.25.-q - Properties of type I and type II superconductors.
72.70.+m - Noise processes and phenomena.
71.45.Lr - Charge-density-wave systems.

© EDP Sciences 2005