Spin dynamics of localized excitons in semiconductor quantum wells in an applied magnetic field

We have theoretically investigated the spin dynamics of the particles in an exciton localized in the interface imperfections of a semiconductor quantu m well. The electron-hole exchange interaction is calculated by averaging t he localized-exciton states. Discussion of the experimental data addresses the effects of temperature on the spin precession when magnetic field is ap plied to the quantum well system.