Abstract
We explain the experimental observation of only zero-spin biexciton in GaAs quantum wells, contrary to different spin configurations known in bulk crystals. Making use of the exciton Hamiltonian that reduces the four-body biexciton problem to two-exciton problem, we show that the only possible bound state of two excitons is a linear combination of two bright excitons with spins ±1 and two dark excitons with spins ±2. We suggest experiments that can detect the existence of the dark component of the biexciton wave function.
Original language | English |
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Pages (from-to) | 728-734 |
Number of pages | 7 |
Journal | Europhysics Letters |
Volume | 59 |
Issue number | 5 |
DOIs | |
State | Published - Sep 2002 |
Externally published | Yes |
ASJC Scopus subject areas
- General Physics and Astronomy