Abstract
In the effective-mass approximation, using asimple two-parameter wave function and a one-dimensional (1D)equivalent potential model, we calculate variationally the bindingenergy of an exciton bound to a neutral donor (D0,X) in finiteGaAs-AlxGa1−xAs quantum well wires (QWWs). At the wirewidth of 25 Å, the binding energy has a peak value, whichis also at the position of the peak of the exciton bindingenergy, and the center-of-mass wave functions of excitons reachesthe most centralized distribution. In addition, the changingtendency of the average interparticle distance as the wire widthis reverse to that of the binding energy.
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