| Автор | L E Oliveira |
| Дата выпуска | 1983-07-01 |
| dc.description | The nearly free-electron self-consistent-field pseudopotential theory is used to analytically evaluate the dielectric function epsilon (k, omega ) for the alkali metals Li, Na and K, the effects of the crystal potential being included up to second order in the U<sub>G</sub> pseudopotential form factor, in the high-frequency limit. The plasmon dispersion omega <sub>p</sub>(k) is then obtained from the strong peak position of the electron energy loss function. The results are compared with experiment for Li, Na and K, and for increasing mod k mod the discrepancies between the theoretical and experimental plasmon dispersion become noticeable because the calculated dispersion curve is too steep when compared with experiment. The anisotropy of the dispersion is also calculated and found to be rather small for Na and K, while for Li, which has a larger pseudopotential coefficient, the plasmon anisotropy can be quite considerable for large values of mod k mod and should be noticeable experimentally. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | On the plasma dispersion in the alkali metals: a nearly free-electron pseudopotential calculation |
| Тип | paper |
| DOI | 10.1088/0305-4608/13/7/017 |
| Print ISSN | 0305-4608 |
| Журнал | Journal of Physics F: Metal Physics |
| Том | 13 |
| Первая страница | 1465 |
| Последняя страница | 1470 |
| Аффилиация | L E Oliveira; Inst. de Fisica, Univ. Estadual de Campinas, Campinas, Sao Paulo, Brazil |
| Выпуск | 7 |
