dc.creator | Zheng, Xiang | |
dc.creator | Rodriguez, Sergio Y. | |
dc.creator | Ross, Joseph H. Jr. | |
dc.date.accessioned | 2016-01-11T23:58:02Z | |
dc.date.available | 2016-01-11T23:58:02Z | |
dc.date.issued | 2011 | |
dc.identifier.citation | Phys. Rev. B 84, 024303 (2011) | en |
dc.identifier.uri | https://hdl.handle.net/1969.1/156016 | |
dc.description.abstract | Atomic motion of guest atoms inside semiconducting clathrate cages is considered an important source for glasslike thermal behavior. 69Ga and 71Ga 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. | en |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | |
dc.title | NMR relaxation and rattling phonons in type-I Ba8Ga16Sn30 clathrate | en |
dc.type | Article | en |
local.department | Physics and Astronomy | en |
dc.identifier.doi | 10.1103/PhysRevB.84.024303 | |