Original scientific paper
Density of states and Fermi energy of the bcc alkali metals : Li, Na and K
Ahmed M. Radwan
; Theoretical Physics Laboratory, National Research Centre, Cairo, Egypt
Adel A. Mosharafa
; Mathematics Dept., Faculty of Science, Cairo University, Egypt
Abstract
The density of states and the Fermi energy of the bcc metals: Li, Na and K are calculated by using the tetrahedron method and utilising results from our previous energy bands calculations. The occupied bandwidth, thermal mass ratio, and electron-phonon coupling parameter are computed and compared with available theoretical and experimental results. For Li, Na and K, respectively, the occupied bandwidths in Ry are 0.253, 0.223 and 0.149 for the energy independent calculation and 0.287, 0.255 and 0.179 for the dependent one. The thermal mass ratio for the three metals respectively are 1.49, 1.10 and 1.07. These results compare well with other theoretical results, and are in fairly good agreement with experiment. Our procedure is, therefore, justified and even favoured since it economises computing time.
Keywords
Hrčak ID:
331469
URI
Publication date:
8.1.1989.
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