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Dielectric response of metallic crystal made up of highly polarisable molecules: the semi-classical approach
2009
Open Physics
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AbstractThe dielectric response is considered within models of a one-band metal, a two-band insulator and a two-band metal using the semi-classical approximation. Corresponding dielectric functions are found. The dielectric function of two-band metal is found to be the interpolation between the Sellmeyer and Lorenz-Lorentz expressions, respectively. The frequencies of the collective modes are identified as the zeroes of the dielectric functions. The correspondence between the semi-classical
doi:10.2478/s11534-008-0160-8
fatcat:cfagnmzopbcuxmqnnigw3ywh4m