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

References in corpus (2)

• Orbital ordering phenomena in $d$- and $f$-electron systems
• Interplay between local electron correlation and Janh-Teller electron-phonon interaction

Cited by in corpus (2)

• Inelastic Scattering from Local Vibrational Modes
• Local phonon mode in a fermionic bath, and its relation to Kondo effect