Spin Fluctuation and Persistent Current in a Mesoscopic Ring Coupled to a Quantum Dot

Abstract

We investigate the persistent current influenced by the spin fluctuations in a mesoscopic ring weakly coupled to a quantum dot. It is shown that the Kondo effect gives rise to some unusual features of the persistent current in the limit where the charge transfer between two subsystems is suppressed. Various aspects of the crossover from a delocalized to a localized dot limit are discussed in relation with the effect of the coherent response of the Kondo cloud to the Aharonov-Bohm flux.

4 pages, 2 figures

References in corpus (2)

• The Kondo Effect in the Unitary Limit
• Anti-Kondo resonance in transport through a quantum wire with a side-coupled quantum dot

Cited by in corpus (14)

• The Kondo Screening Cloud around a Quantum Dot: Large-scale numerical Results
• Persistent currents through a quantum impurity: Protection through integrability
• Spin-orbit coupling effect on the persistent currents in mesoscopic ring with an Anderson impurity
• Magnetic Polarization Currents in Double Quantum Dot Devices
• Effects of external radiation on biased Aharonov-Bohm rings
• Phase Effects on the Conductance Through Parallel Double Dots
• Kondo Effect and Persistent Currents in a Mesoscopic Ring: Numerically Exact Results
• Reducing entanglement with symmetries: application to persistent currents in impurity problems
• Effect of Charge Fluctuations on the Persistent Current through a Quantum Dot
• Fermi Liquid Theory for the Persistent Current Past a Side-Coupled Quantum Dot
• Persistent Currents in Normal Metal Rings (Yale PhD thesis)
• Spin Fluctuation Induced Dephasing in a Mesoscopic Ring
• Measurement Induced Dephasing and Suppression of Persistent Current in a Lattice Ring
• Importance of individual scattering matrix elements at Fano resonances