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Casimir force between atomically thin gold films

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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.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Royal Institute of Technology, 10044, Stockholm, Sweden

    Mathias Boström & Clas Persson

  2. Department of Physics, University of Oslo, P.O. Box 1048, Blindern, 0316, Oslo, Norway

    Clas Persson

  3. Division of Theory and Modeling, Department of Physics, Chemistry and Biology, Linköping University, 58183, Linköping, Sweden

    Bo E. Sernelius

Authors
  1. Mathias Boström
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  2. Clas Persson
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  3. Bo E. Sernelius
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Correspondence to Bo E. Sernelius.

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Boström, M., Persson, C. & Sernelius, B. Casimir force between atomically thin gold films. Eur. Phys. J. B 86, 43 (2013). https://doi.org/10.1140/epjb/e2012-31051-9

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  • DOI: https://doi.org/10.1140/epjb/e2012-31051-9

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