Kondo-excitons and Auger processes in self-assembled quantum dots

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

Research output: Contribution to journalArticle

Abstract

We describe theoretically novel excitons in self-assembled quantum dots interacting with a two-dimensional (2D) electron gas in the wetting layer. In the presence of the Fermi sea, the optical lines become strongly voltage-dependent. If the electron spin is nonzero, the width of optical lines is given by kBTK, where TK is Kondo temperature. If the spin is zero, the exciton couples with the continuum due to Auger-like processes. This leads to anticrossings in a magnetic field. Such states can be called Kondo-Anderson excitons. Some of the described phenomena are observed in recent experiments.

Original languageEnglish
Pages (from-to)107-112
Number of pages6
JournalMRS Online Proceedings Library
Volume737
Publication statusPublished - 2003
EventQuantum Confined Semiconductor Nanostructures - Boston MA, United States
Duration: 2 Dec 20025 Dec 2002

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