Non-Fermi-liquid Kondo screening under Rabi driving

Lee, Seung-Sup B.; Delft, Jan von; Goldstein, Moshe (2020): Non-Fermi-liquid Kondo screening under Rabi driving. In: Physical Review B, Vol. 101, No. 8, 085110

Abstract

We investigate a Rabi-Kondo model describing an optically driven two-channel quantum dot device featuring a non-Fermi-liquid Kondo effect. Optically induced Rabi oscillation between the valence and conduction levels of the dot gives rise to a two-stage Kondo effect: Primary screening of the local spin is followed by secondary nonequilibrium screening of the local orbital degree of freedom. Using bosonization arguments and the numerical renormalization group, we compute the dot emission spectrum and residual entropy. Remarkably, both exhibit two-stage Kondo screening with non-Fermi-liquid properties at both stages.

• Item Type: Journal article
• Faculties: Physics
• Subjects: 500 Science > 530 Physics
• ISSN: 2469-9950
• Language: English