標題: NMR evidence for the partially gapped state in CeOs2Al10
作者: Lue, C. S.
Yang, S. H.
Su, T. H.
Young, Ben-Li
電子物理學系
Department of Electrophysics
公開日期: 22-Nov-2010
摘要: We report the results of a Al-27 nuclear magnetic resonance (NMR) study of CeOs2Al10 at temperatures between 4 and 300 K. This material has been of current interest due to indications of hybridization gap behavior below the transition temperature T-o similar or equal to 29 K. Five Al-27 NMR resonance lines that are associated with five nonequivalent crystallographic aluminum sites have been resolved. For each individual aluminum site, the low-temperature NMR Knight shift goes over a thermally activated response. The temperature-dependent spin-lattice-relaxation rate exhibits a rapid drop below T-o, indicative of the formation of an energy gap in this material. We interpret the Knight shift and the relaxation-rate data in light of the presence of a pseudogap with residual electronic density of states at the Fermi level. Moreover, the magnitude of the pseudogap of 120 K is extracted from NMR results, in agreement with the value obtained from the inelastic neutron-scattering experiment.
URI: http://dx.doi.org/10.1103/PhysRevB.82.195129
http://hdl.handle.net/11536/150172
ISSN: 1098-0121
DOI: 10.1103/PhysRevB.82.195129
期刊: PHYSICAL REVIEW B
Volume: 82
Issue: 19
起始頁: 0
結束頁: 0
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