Kleinman's Dielectric Function and Interband Optical Absorption Strength of Simple Metals : Condensed Matter: Electronic Properties, etc.
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概要
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The Kleinman's dielectric function with appropriately screened particle-hole interactions is numerically studied to investigate its effect on the spectral shape of the imaginary part, particularly for q larger than twice the Fermi wavenumber p_f. It is found that the spectral shape is remarkably enhanced on the low energy side under the influence of the proper inclusion of particle-hole interaction for q = 2.28p_f, the smallest reciprocal lattice vector of sodium, in contrast with Hubbard's dielectric function. The interband optical absorption strength of sodium calculated from the Hopfield formula using this dielectric function is therefore enhance enough to be in good agreement with experiment.
- 社団法人日本物理学会の論文
- 2000-07-15
著者
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Higuchi Masahiko
Department Of Physics Faculty Of Science Shinshu University
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Yasuhara Hiroshi
Department Of Physics Graduate School Of Science Tohoku University
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