Kondo excitons in self-assembled quantum dots

A. O. Govorov, K. Karrai, R. J. Warburton

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23 Citations (Scopus)

Abstract

We describe excitons in quantum dots by allowing for an interaction with a Fermi sea of electrons. We argue that these excitons can be realized very simply with self-assembled quantum dots, using the wetting layer as host for the Fermi sea. We show that a tunnel hybridization of a charged exciton with the Fermi sea leads to two striking effects in the optical spectra. First, the photoluminescence lines become strongly dependent on the vertical bias. Second, if the exciton spin is nonzero, the Kondo effect leads to peculiar photoluminescence line shapes with a linewidth determined by the Kondo temperature.

Original languageEnglish
Article number241307
Pages (from-to)2413071-2413074
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume67
Issue number24
Publication statusPublished - Jun 2003

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    Govorov, A. O., Karrai, K., & Warburton, R. J. (2003). Kondo excitons in self-assembled quantum dots. Physical Review B: Condensed Matter and Materials Physics, 67(24), 2413071-2413074. [241307].