E. V. Anda

Transport in coupled quantum dots: Kondo effect versus antiferromagnetic correlation

The interplay between the Kondo effect and the interdot magnetic interaction in a coupled-dot system is studied. An exact result for the transport properties at zero temperature is obtained by diagonalizing a cluster, composed by the double dot and its vicinity, which is connected to leads. It is shown that the system goes continuously from the Kondo regime to an antiferromagnetic state as the interdot interaction is increased. The conductance, the charge at the dots, and the spin-spin correlation are obtained as a function of the gate potential.

KONDO RESONANCE EFFECT ON PERSISTENT CURRENTS THROUGH A QUANTUM DOT IN A MESOSCOPIC RING

The persistent current through a quantum dot inserted in a mesoscopic ring of length L is studied. A cluster representing the dot and its vicinity is exactly diagonalized and embedded into the rest of the ring. The Kondo resonance provides a new channel for the current to flow. It is shown that due to scaling properties, the persistent current at the Kondo regime is enhanced relative to the current flowing either when the dot is at resonance or along a perfect ring of same length. In the Kondo regime the current scales as

Kondo effect and bistability in a double quantum dot

L^{-1/2}

Fano resonance in electronic transport through a quantum wire with a side-coupled quantum dot: X -boson treatment

, unlike the

Kondo effect in transport through molecules adsorbed on metal surfaces: from Fano dips to Kondo peaks

L^{-1}

Kondo and Dicke effect in quantum dots side coupled to a quantum wire

scaling of a perfect ring. We discuss the possibility of detection of the Kondo effect by means of a persistent current measurement.

Phase effects on the conductance through parallel double dots

We study theoretically the out-of-equilibrium transport properties of a double quantum dot system in the Kondo regime. We model the system by means of a two-impurity Anderson Hamiltonian. The transport properties are characterized by Kondo effect properties, however, superimposed on them, and the system possesses nonlinear bistability behavior.

Kondo effect in side coupled double quantum-dot molecule

The transport through a quantum wire with a side-coupled quantum dot is studied. We use the X-boson treatment for the Anderson single impurity model in the limit of

Effect of topology on the transport properties of two interacting dots

U=\ensuremath{\infty}.

Kondo effect and persistent currents in a mesoscopic ring: Numerically exact results

The conductance presents a minimum for values of