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.
ASJC Scopus subject areas
- Physics and Astronomy(all)