Kondo Regime of a Quantum Dot Molecule: A Finite-U Slave-Boson Approach
arXiv:cond-mat/0511226 · doi:10.1016/j.physe.2006.03.099
Abstract
We study the electronic transport in a double quantum dot structure connected to leads in the Kondo regime for both series and parallel arrangements. By applying a finite-U slave boson technique in the mean field approximation we explore the effect of level degeneracy in the conductance through the system. Our results show that for the series connection, as the energy difference of the localized dot levels increases, the tunneling via the Kondo state is destroyed. For the parallel configuration, we find an interesting interplay of state symmetry and conductance. Our results are in good agrement with those obtained with other methods, and provide additional insights into the physics of the Kondo state in the double dot system.
arXiv comment4 pages, 5 figures, to appear in Physica E
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- Capacitively coupled double quantum dot system in the Kondo regime
- The role of the indirect tunneling processes and asymmetry in couplings in orbital Kondo transport through double quantum dots
- Kondo temperature and screening extension in a double dot system
- Transport properties of a two impurity system: a theoretical approach
- Transmission in double quantum dots in the Kondo regime: Quantum-critical transitions and interference effects
- The RKKY Interaction and the Nature of the Ground State of Double Dots in Parallel