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Dielectric function of hexagonal metals: II. Beryllium
Author(s) -
Taut M.,
Hanee W.
Publication year - 1976
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220770215
Subject(s) - beryllium , condensed matter physics , materials science , plasmon , dielectric function , dielectric , anisotropy , hexagonal crystal system , relaxation (psychology) , dispersion relation , dispersion (optics) , optics , physics , optoelectronics , chemistry , crystallography , psychology , social psychology , nuclear physics
The longitudinal dielectric function ϵ( q ,ω) of beryllium is calculated using realistic wave functions and band energies. Comparison with experiment is performed in the optical properties (including anisotropy), plasmon dispersion relation, and half width of the plasmon peak. The relaxation times for inclusion of damping are fitted. The experimentally observed peak splitting of the loss function is explained as a band structure effect.