Kondo Effect in an Electron System with Dynamical Jahn-Teller Impurity

Abstract

We investigate how Kondo phenomenon occurs in the Anderson model dynamically coupled with local Jahn-Teller phonons. It is found that the total angular moment composed of electron pseudo-spin and phonon angular moments is screened by conduction electrons. Namely, phonon degrees of freedom essentially contribute to the formation of singlet ground state. A characteristic temperature of the Kondo effect due to dynamical Jahn-Teller phonons is explained by an effective $s$-$d$ Hamiltonian with anisotropic exchange interaction obtained from the Jahn-Teller-Anderson model in a non-adiabatic region.

5 pages, 3 figures

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• Kondo Effect of a Vibrating Magnetic Impurity
• Strong-Coupling Theory of Rattling-Induced Superconductivity
• Multipole Susceptibility of Multiorbital Anderson Model Coupled with Jahn-Teller Phonons
• Inelastic Scattering from Local Vibrational Modes
• Kondo Effect of a Magnetic Ion Vibrating in a Harmonic Potential
• Effect of Anharmonicity on the Kondo Phenomena of a Magnetic Ion Vibrating in a Confinement Potential
• Bipolaron-SO(5) Non-Fermi Liquid in a Two-channel Anderson Model with Phonon-assisted Hybridizations
• Local phonon mode in a fermionic bath, and its relation to Kondo effect
• Heavy-Electron Formation and Bipolaronic Transition in the Anharmonic Holstein Model
• Fermi-surface topologies and low-temperature phases of the filled Skutterudite compounds CeOs${}_4$Sb${}_{12}$ and NdOs${}_4$Sb${}_{12}$
• Electric Dipolar Susceptibility of the Anderson-Holstein Model
• Kondo Effect of a Jahn-Teller Ion Vibrating in a Cubic Anharmonic Potential
• Elemental Dilution Effect on the Elastic Response due to a Quadrupolar Kondo Effect of the Non-Kramers System Y${}_{1-x}$Pr${}_x$Ir${}_2$Zn${}_{20}$
• Chaos in Jahn-Teller Rattling