Aharonov-Bohm Effect for Parallel and T-shaped Double Quantum Dots

Abstract

We investigate the Aharonov-Bohm (AB) effect for the double quantum dots in the Kondo regime using the slave-boson mean-field approximation. In contrast to the non-interacting case, where the AB oscillation generally has the period of 4$\pi$ when the two-subring structure is formed via the interdot tunneling $t_c$, we find that the AB oscillation has the period of 2$\pi$ in the Kondo regime. Such effects appear for the double quantum dots close to the T-shaped geometry even in the charge-fluctuation regime. These results follow from the fact that the Kondo resonance is always fixed to the Fermi level irrespective of the detailed structure of the bare dot-levels.

3 pages, 4 figures; minor changes

References in corpus (6)

• Interference Effects on Kondo-Assisted Transport through Double Quantum Dots
• Probing spin and orbital Kondo effects with a mesoscopic interferometer
• Controlling Fano and Dicke effects via a magnetic flux in a double quantum-dot molecule
• Magnetic field dependent transmission phase of a double dot system in a quantum ring
• Spin-Polarized Transprot through Double Quantum Dots
• Indirect Exchange Interaction between two Quantum Dots in an Aharonov-Bohm Ring

Cited by in corpus (2)

• Signatures of quantum phase transitions in parallel quantum dots: Crossover from local-moment to underscreened spin-1 Kondo physics
• Antisymmetric Spin-Orbit Coupling Effect on Kondo-Induced Electric Polarization in a Triangular Triple Quantum Dot