Nonequilibrium Transport through Double Quantum Dots: Exact Results near Quantum Critical Point
arXiv:0809.4304 · doi:10.1103/PhysRevLett.102.047201
Abstract
We study a double quantum dot in the regime where each dot carries a spin-1/2. This system is described by the 2-impurity Kondo model, having a non-Fermi liquid fixed point for a critical value of the inter-impurity coupling. The Hamiltonian describing the vicinity of the critical point, including the relevant potential scattering perturbations, can be cast in quadratic form. This allows us to predict a universal scaling function for the finite temperature nonlinear conductance along the crossover from the critical point to the surrounding stable fixed points.
4 pages, 2 figures
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Cited by in corpus (39)
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