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Phys. Rev. Lett. 83, 600–603 (1999)

Transport in Multilevel Quantum Dots: From the Kondo Effect to the Coulomb Blockade Regime

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A. Levy Yeyati, F. Flores, and A. Martín-Rodero
Departamento de Física Teórica de la Materia Condensada C-V, Universidad Autónoma de Madrid, E-28049 Madrid, Spain

Received 23 October 1998; published in the issue dated 19 July 1999

A new theoretical method is introduced to study coherent electron transport in an interacting multilevel quantum dot. The method yields the correct behavior in the limit of both weak and strong coupling to the leads, giving a unified description of the Coulomb blockade and the Kondo effect. Results for the density of states and the temperature-dependent conductance for a two-level dot are presented. The relevance of these results in connection to recent experiments on the Kondo effect in semiconducting quantum dots is discussed.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.600
DOI:
10.1103/PhysRevLett.83.600
PACS:
73.40.Gk, 72.15.Qm, 73.20.Dx, 73.23.-b