TY - JOUR
T1 - Connection between Charge Fluctuations and the Coherent Temperature in the Heavy-Fermion System SmOs4Sb12
T2 - A Sb121,123 NQR Study
AU - Kotegawa, H.
AU - Hidaka, H.
AU - Kobayashi, T. C.
AU - Kikuchi, D.
AU - Sugawara, H.
AU - Sato, H.
PY - 2007/10/12
Y1 - 2007/10/12
N2 - We report Sb121,123 nuclear quadrupole resonance measurements under pressure in a novel heavy fermion (HF) system SmOs4Sb12. The nuclear spin-spin relaxation rate 1/T2 exhibits a distinct peak near the coherent temperature of the Kondo effect. The isotope effect of Sb121 and Sb123 indicates that the peak in 1/T2 is electrical in origin. The connection between the peak in 1/T2 and the development of coherency of the Kondo effect is robust even under pressure. It is conjectured that charge fluctuation plays an important role in forming the HF state in SmOs4Sb12.
AB - We report Sb121,123 nuclear quadrupole resonance measurements under pressure in a novel heavy fermion (HF) system SmOs4Sb12. The nuclear spin-spin relaxation rate 1/T2 exhibits a distinct peak near the coherent temperature of the Kondo effect. The isotope effect of Sb121 and Sb123 indicates that the peak in 1/T2 is electrical in origin. The connection between the peak in 1/T2 and the development of coherency of the Kondo effect is robust even under pressure. It is conjectured that charge fluctuation plays an important role in forming the HF state in SmOs4Sb12.
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U2 - 10.1103/PhysRevLett.99.156408
DO - 10.1103/PhysRevLett.99.156408
M3 - Article
AN - SCOPUS:35248863044
SN - 0031-9007
VL - 99
JO - Physical Review Letters
JF - Physical Review Letters
IS - 15
M1 - 156408
ER -