| Автор | C H Lee |
| Автор | H Yoshizawa |
| Автор | M A Avila |
| Автор | I Hase |
| Автор | K Kihou |
| Автор | T Takabatake |
| Дата выпуска | 2007-12-01 |
| dc.description | Phonon dynamics of type-I clathrates Ba<sub>8</sub>Ga<sub>16</sub>Ge<sub>30</sub> has been studied at room temperature by inelastic neutron scattering for energy less than 9 meV. Optical phonons associated with large vibrations of Ba atoms filled in large tetrakaidecahedral cages are observed around E = 4.5 meV. Analysis based on a Born-Von Kármán force model shows that the longitudinal force constants between the Ba atoms and the oversized cages has a relatively small value of 0.011 ∼ 0.014 mdyn/Â. The results indicate that the Ba atoms are very loosely bound to the surrounding oversized cages that consist of Ga and Ge atoms. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2007 IOP Publishing Ltd |
| Название | Neutron scattering study of phonon dynamics on type-I Clathrate Ba<sub>8</sub>Ga<sub>16</sub>Ge<sub>30</sub> |
| Тип | paper |
| DOI | 10.1088/1742-6596/92/1/012169 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 92 |
| Первая страница | 12169 |
| Последняя страница | 12172 |
| Выпуск | 1 |
