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 language | English (US) |
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Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 67 |
Issue number | 15 |
DOIs | |
State | Published - Apr 29 2003 |
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics