Electric Dipolar Kondo Effect Emerging from Vibrating Magnetic Ion

Abstract

When a magnetic ion vibrates in a metal, it inevitably introduces a new channel of hybridization with conduction electrons and in general, the vibrating ion induces electric dipole moment. In such a situation, we find that magnetic and non-magnetic Kondo effects alternatively occur due to the screening of spin moment and electric dipole moment of vibrating ion. In particular, electric dipolar two-channel Kondo effect is found to occur for weak Coulomb interaction. We also show that magnetically robust heavy-electron state appears near the fixed point of electric dipolar two-channel Kondo effect. We believe that the {\it vibrating} magnetic ion opens a new door in the Kondo physics.

4 pages, 4 figures

References in corpus (3)

• Phonon-assisted tunneling and two-channel Kondo physics in molecular junctions
• 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

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• Thermopower enhancement by encapsulating cerium in clathrate cages
• Valence fluctuations in Sn(Pb)${}_2$P${}_2$S${}_6$ ferroelectrics
• Electric Dipolar Susceptibility of the Anderson-Holstein Model
• Kondo Effect of a Jahn-Teller Ion Vibrating in a Cubic Anharmonic Potential
• Chaos in Jahn-Teller Rattling
• Continuous-time Quantum Monte Carlo Approach for Impurity Anderson Models with Phonon-assisted Hybridizations