Universality of the conductance in quantum dot transport

Details Universality of the conductance in quantum dot transport Universality of the conductance in quantum dot transport

2009-01-28

arxiv.org/abs/0901.4422v2

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

12 pages

Scientific paper

We revisited the scaling behavior of the transport properties of a quantum dot system described by the spin-1/2 Anderson model using analytical methods. In the low temperature limit we show that the conductance has a universal behavior with universality between temperature and bias. We compare this result with the empirical formula used to fit the experimental data for conductance in the case of the equilibrium transport through a single channel quantum dot. In the high temperature limit the conductance obtained from the Anderson model is compared with previous results obtained from the Kondo model. The universal behavior is present also in the high temperature limit. These results are in good agreement with the Renormalization group calculations.

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