Influence of surface electronic structure on the Casimir force

• Published in: Solid state communications Vol. 151; no. 19; pp. 1363 - 1366
• Main Authors: Marušić, L., Despoja, Vito, Šunjić, Marijan
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 01.10.2011; Elsevier
• Subjects: A. Metals; A. Thin films; Collective excitations (including excitons, polarons, plasmons and other charge-density excitations); Condensed matter: electronic structure, electrical, magnetic, and optical properties; D. Electron–electron interaction; D. Optical properties; Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures; Exact sciences and technology; Physics; Surface and interface electron states; D. Electron–electron interaction; A. Thin films; D. Optical properties; A. Metals; Surface electron state; Microscopic model; Response functions; D. Electron-electron interaction; Thin films; Silver; Jellium model; One dimensional model; Casimir effect; Elementary excitation; Wave functions; Electron density; Interaction energy; Surface polaritons
• ISSN: 0038-1098; 1879-2766
• DOI: 10.1016/j.ssc.2011.06.016

Recent nonlocal microscopic theory of Casimir force which expresses the interaction energy between two metallic slabs in terms of surface polariton propagators calculated from diamagnetic and paramagnetic current–current response functions, sensitive to details of the surface electron density profiles and single-particle excitations on the surfaces, is used here to calculate various contributions to the Casimir energies for a silver film described by two different models. Current–current response functions are constructed from energy levels and wave functions obtained in two different models: jellium and Chulkov one-dimensional model potential, and the results are compared with the local plasmon model results. The results show how the details of such surface electronic structure modify Casimir force. ► High accuracy calculations of the Casimir force between silver metallic slabs. ► Casimir force modifications caused by paramagnetic s (TE) surface current fluctuations. ► Dependence of the Casimir force on the model surface charge density profile.