Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells

Details Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells

2005-12-12

arxiv.org/abs/cond-mat/0512221v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 9 figures

Scientific paper

10.1103/PhysRevB.73.235329

The spin dynamics of an interwell excitons gas has been investigated in n-i-n GaAs/AlGaAs coupled quantum wells (CQWs). In these heterostructures the electron and the hole are spatially separated in neighboring quantum wells by a narrow AlAs barrier, when an electric field is applied. The time evolution kinetics of the interwell exciton photoluminescence has been measured under resonant excitation of the 1sHH intrawell exciton, using a pulsed tunable laser. The formation of a collective exciton phase in time and the temperature dependence of its spin relaxation rate have been studied. The spin relaxation rate of the interwell excitons is strongly reduced in the collective phase. This observation provides evidence for the coherence of the indirect excitons collective phase at temperatures below a critical $T_c$.

Affiliated with

Also associated with

No associations

Rating

Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Coherent spin dynamics of an interwell excitons gas in GaAs/AlGaAs coupled quantum wells will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-502186