Abstract
The problem of a biexciton confined in parabolic GaAs quantum-well wires in the presence of a perpendicular magnetic field is discussed. We apply an analytical one-dimensional formula for the effective interaction potential between the confined charge carriers to study the binding energies of a biexciton, which results in a numerical “exactly” solvable model. The ratio of the binding energy of a biexciton to that of an exciton for a range of confinement lengths (l<ad) is found from 0.183 to 0.313. Magnetic field dependence of the biexciton binding energy is also investigated and it is found that the influence is stronger when the confinement length is larger.
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