A QUANTUM MONTE CARLO STUDY ON EXCITONIC COMPLEXES IN <font>GaAs/AlGaAs</font> QUANTUM WIRES

Abstract

Binding energies of biexcitons and charged excitons in GaAs/Al 0.3 Ga 0.7 As quantum wires were calculated by the diffusion Monte Carlo method. The binding energy for the negatively charged excitons is enhanced strongly, because of the mismatch of the electron and the hole wave functions. The resulting biexciton binding energy reproduces experimental results quite well.