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Lattice dynamics of AlH3 and AlD3 by inelastic neutron scattering: High-energy band of optical bond-stretching vibrationsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
- Авторы: Kolesnikov A.I., Antonov V.E., Markushkin Yu E., Natkaniec I., Sakharov M.K.
- Журнал: Physical Review B
- Том: 76
- Номер: 6
- Год издания: 2007
- Издательство: American Physical Society
- Местоположение издательства: United States
- Первая страница: 064302-1
- Последняя страница: 064302-7
- DOI: 10.1103/PhysRevB.76.064302
- Аннотация: Inelastic neutron scattering (INS) spectra of trigonal alpha-AlH3 and alpha-AlD3 have been measured in a wide range (5-150 meV) of energy transfers with a much better statistical accuracy than previously using the inverted-geometry NERA-PR spectrometer at JINR, Dubna. The studied energy interval covers the range of low-frequency lattice vibrations and a broad band of optical H vibrations. By using a direct-geometry HRMECS spectrometer at ANL, Argonne, the AlH3 hydride was also examined by INS at energy transfers up to 315 meV in the regime of small momentum transfers. This significantly enhanced the contribution from the one-phonon neutron scattering and allowed an observation and accurate examination of one more, high-energy band of optical H vibrations predicted theoretically [C. Wolverton , Phys. Rev. B 69, 144109 (2004)]. Combining the obtained experimental data, the entire spectrum of phonon density of states was reconstructed for both alpha-AlH3 and alpha-AlD3.
- Добавил в систему: Антонов Владимир Евгеньевич