Multi-state and non-volatile control of graphene conductivity with surface electric fields

TL;DR

This paper demonstrates a method for controlling graphene's conductivity using surface electric fields on a ferroelectric substrate, enabling multi-level, low-power, and reversible memory states with potential for multifunctional applications.

Contribution

It introduces a lateral control technique for graphene conductivity using patterned electrodes on ferroelectric substrates, achieving multi-level, low-power, and reversible memory states.

Findings

Achieved reversible control of 11 graphene resistance states

Demonstrated low electric field susceptibility exceeding vertical gating methods

Enabled multimemory and multifunctional device applications

Abstract

Planar electrodes patterned on a ferroelectric substrate are shown to provide lateral control of the conductive state of a two-terminal graphene stripe. A multi-level and on-demand memory control of the graphene resistance state is demonstrated under low sub-coercive electric fields, with a susceptibility exceeding by more than two orders of magnitude those reported in a vertical gating geometry. Our example of reversible and low-power lateral control over 11 memory states in the graphene conductivity illustrates the possibility of multimemory and multifunctional applications, as top and bottom inputs remain accessible.