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      Plasmonic contribution to the van der Waals energy in strongly interacting bilayers

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      Author(s)
      Tas, M.
      Tanatar, Bilal
      Date
      2010
      Source Title
      PHYSICAL REVIEW B
      Print ISSN
      1098-0121
      Publisher
      The American Physical Society
      Volume
      81
      Issue
      11
      Pages
      115326-1 - 115326-7
      Language
      English
      Type
      Article
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      Abstract
      We investigate the van der Waals or interaction energy due to the plasmon modes in bilayer fermion and boson systems for several layer separation and coupling strength values. Interaction effects are studied within the random-phase approximation RPA , the quasilocalized charge approximation QLCA , and the Singwi, Tosi, Land, and Sjölander STLS models of the dielectric function formalism. We find that the interaction becomes repulsive at short separation distances for strongly coupled systems described by the QLCA and STLS approaches in contrast to attractive behavior predicted by the RPA. At larger separation distances, the interaction energy changes sign within the QLCA and STLS models leading to an attractive interaction. The evident relation between our calculations and the Casimir effect is emphasized
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      http://hdl.handle.net/11693/48586
      Published Version (Please cite this version)
      https://doi.org/10.1103/PhysRevB.81.115326
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