How to observe the giant thermal effect in the Casimir force for graphene systems

TL;DR

This paper proposes a measurement scheme to observe the giant thermal effect in the Casimir force in graphene systems, enabling experimental verification and potential control of dispersion forces in nanodevices.

Contribution

It introduces a differential measurement method using a metal-coated sphere and graphene-coated dielectric, facilitating experimental detection of the thermal Casimir effect in graphene.

Findings

The difference in Casimir forces can be measured with existing setups.

The thermal contribution to the Casimir force in graphene systems is significant.

The scheme enables potential modulation of dispersion forces in nanotechnology.

Abstract

A differential measurement scheme is proposed which allows for a clear observation of the giant thermal effect for the Casimir force, that was recently predicted to occur in graphene systems at short separation distances. The difference among the Casimir forces acting between a metal-coated sphere and the two halves of a dielectric plate, one uncoated and the other coated with graphene, is calculated in the framework of the Dirac model using the rigorous formalism of the polarization tensor. It is shown that in the proposed configuration both the difference among the Casimir forces and its thermal contributioncan be easily measured using already existing experimental setups. An observation of the giant thermal effect should open opportunities for modulation and control of dispersion forces in micromechanical systems based on graphene and other novel 2D-materials.