Artículos de revistas
Binding energy of charged excitons bound to interface defects of semiconductor quantum wells
Registro en:
Physical Review B. American Physical Soc, v. 65, n. 11, 2002.
1098-0121
WOS:000174548400094
10.1103/PhysRevB.65.115325
Autor
Dacal, LCO
Ferreira, R
Bastard, G
Brum, JA
Institución
Resumen
We present a model that takes into account the interface-defects contribution to the binding energy of charged excitons (trions). We use Gaussian defect potentials and one-particle Gaussian basis set. All the Hamiltonian defect terms are analytically calculated for the s-like trial wave functions. The dependence of the binding energy and of the trion size on the quantum-well width and on the defect size are investigated using a variational method for GaAs/Al0.3Ga0.7As quantum wells. We show that even in the case of strictly structural defects the trion is more strongly affected than the exciton. 65 11