Stochastic Nonlinear Electrical Characteristics of Graphene

TL;DR

This paper reports on the stochastic nonlinear electrical behavior of graphene, highlighting abrupt current changes and topological modifications, with simulations supporting the experimental observations, advancing understanding of electron transport in graphene devices.

Contribution

It introduces the observation of stochastic nonlinear electrical characteristics in graphene and provides a simulation model explaining the phenomena, which is novel in understanding graphene's transport properties.

Findings

Abrupt current changes with on/off ratio up to 10^3

Graphene channel undergoes topological changes

Simulation aligns with experimental data

Abstract

A stochastic nonlinear electrical characteristic of graphene is reported. Abrupt current changes are observed from voltage sweeps between the source and drain with an on/off ratio up to 10^(3). It is found that graphene channel experience the topological change. Active radicals in an uneven graphene channel cause local changes of electrostatic potential. Simulation results based on the self-trapped electron and hole mechanism account well for the experimental data. Our findings illustrate an important issue of reliable electron transports and help for the understanding of transport properties in graphene devices.