title: Connection between charge fluctuations and the coherent temperature in the heavy-fermion system SmOs4Sb12: a {121, 123}Sb NQR study.
abstract: We report {121, 123}Sb nuclear quadrupole resonance measurements under pressure in a novel heavy fermion (HF) system SmOs4Sb12. The nuclear spin-spin relaxation rate 1/T{2} exhibits a distinct peak near the coherent temperature of the Kondo effect. The isotope effect of 121Sb and 123Sb indicates that the peak in 1/T{2} is electrical in origin. The connection between the peak in 1/T{2} 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.
authors.affiliation: Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Japan.
authors.forename: H
authors.initials: H
authors.lastname: Kotegawa
authors.forename: H
authors.initials: H
authors.lastname: Hidaka
authors.forename: T C
authors.initials: TC
authors.lastname: Kobayashi
authors.forename: D
authors.initials: D
authors.lastname: Kikuchi
authors.forename: H
authors.initials: H
authors.lastname: Sugawara
authors.forename: H
authors.initials: H
authors.lastname: Sato