On anomalous temperature dependence of relaxation rate measured by \muSR in α-YbAl_{0.986}Fe_{0.014}B_4
arXiv:1706.03328 · doi:10.1103/PhysRevB.98.075125
Abstract
Recently, it was reported by MacLaughlin et al. in Phys. Rev. B 93, 214421 (2016) that α-YbAl_{0.986}Fe_{0.014}B_4 exhibits an anomalous temperature dependence in the relaxation rate 1/T_{1} of 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 semi-quantitatively by assuming that the attraction of a screening cloud of conduction electrons about the μ^{+} induces a local magnetic moment arising from a 4f hole on the Yb ion, giving rise to the Kondo effect between heavy quasiparticles.
16 pages, 7 figures
References in corpus (10)
- Quantum critical state in a magnetic quasicrystal
- Quantum Valence Criticality as Origin of Unconventional Critical Phenomena
- Strange metal without magnetic criticality
- Superconductivity emerging near quantum critical point of valence transition
- Magnetic-Field Control of Quantum Critical Points of Valence Transition
- Pressure-Driven Quantum Criticality and T/H Scaling in the Icosahedral Au-Al-Yb Approximant
- New Universality Class of Quantum Criticality in Ce- and Yb-based Heavy Fermions
- T/B Scaling in beta-YbAlB4
- Ubiquity of Unconventional Phenomena Associated with Critical Valence Fluctuations in Heavy Fermion Metals
- Quantum Criticality and Inhomogeneous Magnetic Order in Fe-doped alpha-YbAlB4