Casimir Force between Atomically Thin Gold Films

Abstract

We have used density functional theory to calculate the anisotropic dielectric functions for ultrathin gold sheets (composed of 1, 3, 6, and 15 atomic layers). Such films are important components in nano-electromechanical systems. When using correct dielectric functions rather than bulk gold dielectric functions we predict an enhanced attractive Casimir-Lifshitz force (at most around 20%) between two atomically thin gold sheets. For thicker sheets the dielectric properties and the corresponding Casimir forces approach those of gold half-spaces. The magnitude of the corrections that we predict should, within the today's level of accuracy in Casimir force measurements, be clearly detectable.

4 pages, 4 figures

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Cited by in corpus (12)

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• Electromagnetic properties of thin metallic films
• The van der Waals and Casimir energy of anisotropic atomically thin metallic films
• Nonequilibrium effects in the Casimir force between two similar metallic plates kept at different temperatures
• Characteristic properties of the Casimir free energy for metal films deposited on metallic plates
• The influence of Lifshitz forces and gas on premelting of ice within porous materials
• The Effect of Epsilon-Near-Zero (ENZ) Modes on the Casimir Interaction between Ultrathin Films
• Special features of the thermal Casimir effect across a uniaxial anisotropic film