Mcd. Aguiar et Ja. Brum, Effects of the heavy- and light-hole mixing in the exciton dynamics in semiconductor quantum wells, PHYS ST S-A, 178(1), 2000, pp. 89-93
We present the calculation of the low temperature exciton bimolecular forma
tion rate in quantum wells through acoustic phonon scattering taking into a
ccount the heavy- and light-hole mixing in the hole and exciton states. We
observe a decrease in the exciton formation rate compared to the parabolic
approximation. For symmetric quantum wells, the hole-subband mixing allows
a finite probability of scattering involving the change of parity. This ope
ns a channel for spin-flip transitions during the exciton formation process
.