Electron correlation resonances in the transport through a single quantum level

Details Electron correlation resonances in the transport through a single quantum level Electron correlation resonances in the transport through a single quantum level

1993-10-28

arxiv.org/abs/cond-mat/9310070v1

Phys. Rev. Lett. 71, 2991 (1993)

Physics

Condensed Matter

4 pages (two columns), 3 figures under request

Scientific paper

10.1103/PhysRevLett.71.2991

Correlation effects in the transport properties of a single quantum level coupled to electron reservoirs are discussed theoretically using a non-equilibrium Green functions approach. Our method is based on the introduction of a second-order self-energy associated with the Coulomb interaction that consistently eliminates the pathologies found in previous perturbative calculations. We present results for the current-voltage characteristic illustrating the different correlation effects that may be found in this system, including the Kondo anomaly and Coulomb blockade. We finally discuss the experimental conditions for the simultaneous observation of these effects in an ultrasmall quantum dot.

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