Kondo Resonance Decoherence by an External Potential

Details Kondo Resonance Decoherence by an External Potential Kondo Resonance Decoherence by an External Potential

2005-07-22

arxiv.org/abs/cond-mat/0507518v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 figures

Scientific paper

10.1103/PhysRevB.72.195105

The Kondo problem, for a quantum dot (QD), subjected to an external bias, is analyzed in the limit of infinite Coulomb repulsion by using a consistent equations of motion method based on a slave-boson Hamiltonian. Utilizing a strict perturbative solution in the leads-dot coupling, T, to T^4 and T^6 orders, we calculate the QD spectral density and conductance, as well as the decoherent rate that drive the systemm from the strong to the weak coupling regime. Our results indicate thet the weak coupling regime is reached for voltages larger than a few units of the Kondo temperature.

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