Casimir force between atomically thin gold films

Regular Article

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.

Keywords

Mesoscopic and Nanoscale Systems 

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Copyright information

© EDP Sciences, SIF, Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Mathias Boström
    • 1
  • Clas Persson
    • 1
    • 2
  • Bo E. Sernelius
    • 3
  1. 1.Department of Materials Science and EngineeringRoyal Institute of TechnologyStockholmSweden
  2. 2.Department of PhysicsUniversity of OsloOsloNorway
  3. 3.Division of Theory and Modeling, Department of Physics, Chemistry and BiologyLinköping UniversityLinköpingSweden

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