期刊
PHYSICAL REVIEW B
卷 84, 期 2, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.84.024303
关键词
-
资金
- Robert A. Welch Foundation [A-1526]
- National Science Foundation [DMR-0103455]
Atomic motion of guest atoms inside semiconducting clathrate cages is considered an important source for glasslike thermal behavior. Ga-69 and Ga-71 nuclear magnetic resonance studies on type I Ba8Ga16Sn30 show a clear low-temperature relaxation peak attributed to the influence of Ba rattling dynamics on the framework-atom resonance, with a quadrupolar relaxation mechanism as the leading contribution. Data are analyzed using a two-phonon Raman process, according to a recent theory involving localized anharmonic oscillators. Excellent agreement is obtained using this model, with the parameters corresponding to a uniform array of localized oscillators with very large anharmonicity.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据