Resonance Kondo Tunneling through a Double Quantum Dot at Finite Bias

Details Resonance Kondo Tunneling through a Double Quantum Dot at Finite Bias Resonance Kondo Tunneling through a Double Quantum Dot at Finite Bias

2003-08-29

arxiv.org/abs/cond-mat/0308619v1

Phys. Rev. B 68, 155323 (2003)

Physics

Condensed Matter

11 pages, 6 eps figures included

Scientific paper

10.1103/PhysRevB.68.155323

It is shown that the resonance Kondo tunneling through a double quantum dot (DQD) with even occupation and singlet ground state may arise at a strong bias, which compensates the energy of singlet/triplet excitation. Using the renormalization group technique we derive scaling equations and calculate the differential conductance as a function of an auxiliary dc-bias for parallel DQD described by SO(4) symmetry. We analyze the decoherence effects associated with the triplet/singlet relaxation in DQD and discuss the shape of differential conductance line as a function of dc-bias and temperature.

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