Hysteresis and Noise in Stripe and Clump Forming Systems

TL;DR

This paper uses simulations to study hysteresis and 1/f noise in systems with stripe and clump phases, revealing how disorder influences noise and hysteresis, with implications for understanding high-temperature superconductors.

Contribution

It demonstrates the relationship between phase heterogeneity, noise, and hysteresis in a model system, connecting simulation results to experimental observations.

Findings

Heterogeneous phases exhibit maximal 1/f noise and hysteresis.

Uniform phases show reduced noise and no hysteresis.

Results relate charge heterogeneity to noise and hysteresis in superconductors.

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$^\alpha$ 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.