Influence of Coulomb and phonon interaction on the exciton formation dynamics in semiconductor heterostructures

Walter Hoyer, Mackillo Kira, Stephan W. Koch

Research output: Contribution to journalArticle

67 Scopus citations

Abstract

A microscopic theory is developed to analyze the dynamics of exciton formation out of incoherent carriers in semiconductor heterostructures. The carrier Coulomb and phonon interaction is included consistently. A cluster expansion method is used to systematically truncate the hierarchy problem. By including all correlations up to the four-point (i.e. two-particle) level, the fundamental Fermionic substructure of excitons is fully described. The analysis shows that the exciton formation is an intricate process where Coulomb correlations rapidly build up on a picosecond time scale while phonon dynamics leads to true exciton formation on a nanosecond time scale.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume67
Issue number15
DOIs
StatePublished - Apr 29 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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