Discrete charging of a quantum dot strongly coupled to external leads

R. Berkovits, F. Von Oppen, J. W. Kantelhardt

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

We examine a quantum dot with Ndot; levels which is strongly coupled to leads for varying number of channels N in the leads. It is shown both analytically and numerically that for strong couplings between the dot and the leads, at least Ndot - N bound states (akin to subradiant states in optics) remain on the dot. These bound states exhibit discrete charging and, for a significant range of charging energies, strong Coulomb blockade behavior as a function of the chemical potential. The physics changes for large charging energy, where the same (superradiant) state is repeatedly charged.

Original languageEnglish
Pages (from-to)699-705
Number of pages7
JournalEPL
Volume68
Issue number5
DOIs
StatePublished - 2004

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