Noise In Nonohmic Regimes Of Disordered Systems

TL;DR

This paper reviews experimental observations of noise in disordered systems driven into non-ohmic regimes, highlighting its complex behavior and potential as a tool for studying dynamic properties.

Contribution

It provides a concise overview of noise behavior in non-ohmic regimes of disordered systems and discusses open issues in this emerging research area.

Findings

Noise behavior can oppose resistance changes.

Noise serves as a tool for probing complex system dynamics.

Study of noise in non-ohmic regimes is still developing.

Abstract

We present here a short review of mainly experimental properties of noise as disordered systems are driven into non-ohmic regimes by applying voltages of few volts only. It is found that the noise does not simply follow the resistance in that the direction of change of noise could be opposite to that of resistance. It is discussed how this and other properties make the noise a complementary and incisive tool for studying complex systems, particularly its dynamic properties. Study of noise in non-ohmic regimes in physical systems is rather in a nascent stage. Some of the open issues are highlighted.