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PhysRevB.89.014206.pdf | 1.16 MB | Adobe PDF | 見る/開く |
タイトル: | Inelastic x-ray scattering study of plasmon dispersions in solid and liquid Rb |
著者: | Kimura, K. Matsuda, K. Hiraoka, N. Fukumaru, T. Kajihara, Y. Inui, M. Yao, M. |
著者名の別形: | 松田, 和博 |
発行日: | Jan-2014 |
出版者: | American Physical Society |
誌名: | Physical Review B |
巻: | 89 |
号: | 1 |
論文番号: | 014206 |
抄録: | The plasmon dispersion relations in solid and liquid Rb were determined by inelastic x-ray scattering techniques. In liquid Rb, the plasmon energy increases with the momentum transfer q, whereas in solid Rb, the dispersion curve exhibits a cusplike shape. We also found that the plasmon linewidth in liquid Rb is narrower than that in solid Rb near q=0. These features suggest that the conduction electrons in liquid Rb are more suitably described by the electron gas model than in solid Rb, since the electron gas model predicts a smooth increase in the plasmon energy with q and the infinite lifetime at q=0. The origins of the observed variations in the plasmon energy and the linewidth upon melting are investigated with the aid of theoretical calculations. |
著作権等: | ©2014 American Physical Society. |
URI: | http://hdl.handle.net/2433/193244 |
DOI(出版社版): | 10.1103/PhysRevB.89.014206 |
出現コレクション: | 学術雑誌掲載論文等 |
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