Low-lying excitations at the rare-earth site due to rattling motion in the filled skutterudite LaOs_4Sb_{12} revealed by ^{139}La NMR and ^{121/123}Sb NQR

Simple item page
dc.creatorNakai, Yusuke
dc.creatorIshida, Kenji
dc.creatorSugawara, Hitoshi
dc.creatorKikuchi, Daisuke
dc.creatorSato, Hideyuki
dc.date2007-12-11
dc.date2008-01-09
dc.date.accessioned2026-07-07T08:53:11Z
dc.date.available2026-07-07T08:53:11Z
dc.descriptionWe report experimental results of nuclear magnetic resonance (NMR) at the La site and nuclear quadrupole resonance (NQR) at the Sb site in the filled skutterudite LaOs$_4$Sb$_{12}$. We found that the nuclear spin-lattice relaxation rate divided by temperature $1/T_1T$ at the La site exhibits a different temperature dependence from that at the Sb site. Although $1/T_1T$ at the Sb site is explained by the Korringa mechanism, $1/T_1T$ at the La site exhibits a broad maximum around 50 K, showing the presence of an additional contribution at the La site. The additional low-lying excitations observed at the La site can be understood with the relaxation from anharmonic phonons due to the rattling motion of the La atoms.
dc.description5 pages, 4 figures, final version published in Phys. Rev. B (Rapid Communications)
dc.identifierhttps://arxiv.org/abs/0712.1660
dc.identifierhttp://arxiv.org/abs/0712.1660
dc.identifierPhys. Rev. B 77, 041101(R) (2008)
dc.identifierdoi:10.1103/PhysRevB.77.041101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/145530
dc.subjectStrongly Correlated Electrons
dc.titleLow-lying excitations at the rare-earth site due to rattling motion in the filled skutterudite LaOs_4Sb_{12} revealed by ^{139}La NMR and ^{121/123}Sb NQR
dc.typetext

Files

Collections

arXiv