Crystal Field Triplets: A New Route to Non-Fermi Liquid Physics

Abstract

A model for crystal field triplet ground states on rare earth or actinide ions with dipolar and quadrupolar couplings to conduction electrons is studied for the first time with renormalization group methods. The quadrupolar coupling leads to a new nontrivial, non-Fermi liquid fixed point, which survives in an intermediate valence Anderson model. The calculated magnetic susceptibility displays one parameter scaling, going as $T^{-\alpha }$ ($\alpha \approx 0.4$) at intermediate temperatures, reminiscent of the non-Fermi liquid alloy UCu_{5-x}Pd_x.

4 pages, 3 figures, REVTeX

References in corpus (4)

• Non-Fermi liquid behavior and Griffiths phase in {\it f}-electron compounds
• Evidence for a common physical description of non-Fermi-liquid behavior in f-electron systems
• Finite-Size Bosonization of 2-Channel Kondo Model: a Bridge between Numerical Renormalization Group and Conformal Field Theory
• Numerical Renormalization Group Study of non-Fermi-liquid State on Dilute Uranium Systems

Cited by in corpus (9)

• Anomalous heavy-fermion and ordered states in the filled skutterudite PrFe4P12
• Realization of Heavy Local Fermi Liquid and Non-Fermi Liquid in f${}^2$ Crystalline-Electric-Field Singlet-Triplet Configuration
• Two-channel Kondo Effect Emerging from Nd Ions
• Critical Nature of Non-Fermi Liquid in Spin 3/2 Multipolar Kondo Model
• Bipolaron-SO(5) Non-Fermi Liquid in a Two-channel Anderson Model with Phonon-assisted Hybridizations
• Hidden non-Fermi liquid behavior due to crystal field quartet
• Ground-state phase diagram of the $S=1$ one-dimensional Kondo lattice model with a uniaxial anisotropy under transverse fields
• Quantum Critical Point between Two-Channel Kondo and Fermi-Liquid Phases
• Three Types of Non-Fermi-Liquid Fixed Point for a Triplet Quantum Impurity in a Cubic Metal