Direct and indirect exciton mixing in a slightly asymmetric double quantum well

Details Direct and indirect exciton mixing in a slightly asymmetric double quantum well Direct and indirect exciton mixing in a slightly asymmetric double quantum well

2000-07-21

arxiv.org/abs/cond-mat/0007346v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages and 8 figures

Scientific paper

10.1088/0953-8984/12/48/317

We studied, theoretically, the optical absorption spectra for a slightly asymmetric double quantum well (DQW), in the presence of electric and magnetic fields. Recent experimental results for a 10.18/3.82/9.61 nm GaAs Al(_{.33} )Ga(_{.67})As DQW show clearly the different behavior in the luminescence peaks for the indirect exciton (IX) and left direct exciton (DX) as a function of the external electric field. We show that the presence of a peak near the (DX) peak, attributed to an impurity bound left (DX) in the experimental results, could be a consequence of the non-trivial mixing between excitonic states.

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