Resonant Tunneling through Multi-Level and Double Quantum Dots

Details Resonant Tunneling through Multi-Level and Double Quantum Dots Resonant Tunneling through Multi-Level and Double Quantum Dots

1996-12-16

arxiv.org/abs/cond-mat/9612146v1

Europhysics Letters Vol. 40, 189 (1997).

Physics

Condensed Matter

4 pages, ReVTeX, 4 Postscript figures

Scientific paper

10.1209/epl/i1997-00444-0

We study resonant tunneling through quantum-dot systems in the presence of strong Coulomb repulsion and coupling to the metallic leads. Motivated by recent experiments we concentrate on (i) a single dot with two energy levels and (ii) a double dot with one level in each dot. Each level is twofold spin-degenerate. Depending on the level spacing these systems are physical realizations of different Kondo-type models. Using a real-time diagrammatic formulation we evaluate the spectral density and the non-linear conductance. The latter shows a novel triple-peak resonant structure.

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