Non-Fermi-Liquid Behavior in Metallic Quasicrystals with Local Magnetic Moments
arXiv:1412.3807 · doi:10.1103/PhysRevLett.115.036403
Abstract
Motivated by the intrinsic non-Fermi-liquid behavior observed in the heavy-fermion quasicrystal $\mbox{Au}_{51}\mbox{Al}_{34}\mbox{Yb}_{15}$, we study the low-temperature behavior of dilute magnetic impurities placed in metallic quasicrystals. We find that a large fraction of the magnetic moments are not quenched down to very low temperatures , leading to a power-law distribution of Kondo temperatures $P(T_{\mbox{K}})\sim T_{\mbox{K}}^{α-1}$, with a nonuniversal exponent , in a remarkable similarity to the Kondo-disorder scenario found in disordered heavy-fermion metals. For , the resulting singular $P(T_{\mbox{K}})$ induces non-Fermi-liquid behavior with diverging thermodynamic responses as .
arXiv comment6 pages, 4 figures. Supplemental Material: 7 pages, 7 figures. New results for a 3D quasicrystal discussed in the supplement. Published version
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