SIMPLE-MODEL FOR INTERFACE EXCITON WITH A ELECTRON-HOLE SEPARATION

The new simple theoretical model of Cooper(1) for the interface excito n with an itinerant photo-excited hole is studied. The main parameter of the model is the separation d between electron and hole, which are assumed to be confined in the two planes. By variational numerical cal culation, we obtain the values of main parameters of the exciton: bind ing energies, effective Bohr radius, and oscillator strengths versus p arameter d. Checking the applicable of the model, we find good agreeme nt with the previous obtained results. We find also a strong dependenc e on the separation d and an existence of the ''death region'' of the exciton coursed by the hole band gap potential.