Anomalous temperature dependence of the relaxation rate measured by muon spin rotation in alpha-YbAl0.986Fe0.014B4

Article

关键词: QUANTUM CRITICALITY;    GROUND-STATE;    SUPERCONDUCTIVITY;    CU;   

DOI  :  10.1103/PhysRevB.98.075125

来源: SCIE

【 摘 要 】

Recently, it was reported by MacLaughlin et al. in Phys. Rev. B 93, 214421 (2016) that alpha-YbAl0.986Fe0.014B4 exhibits an anomalous temperature dependence in the relaxation rate 1/T-1 of mu SR, and stressed that such temperature dependence cannot be understood by the scenario based on the quantum critical valence transition (QCVT) while this compound exhibits a series of the non-Fermi-liquid behaviors explained by the theory of the QCVT. In this paper, we point out that the anomalous temperature dependence in 1/T-1 can be understood semiquantitatively by assuming that the attraction of a screening cloud of conduction electrons about the mu(+) induces a local magnetic moment arising from a 4f hole on the Yb ion, giving rise to the Kondo effect between heavy quasiparticles.

【 授权许可】

Free