E. Kasapoglu et al., Binding energy of excitons in symmetric and asymmetric coupled double quantum wells in a uniform magnetic field, SEMIC SCI T, 15(2), 2000, pp. 219-224
The binding energy of excitons in symmetric and asymmetric coupled double G
aAs/Ga1-xAlxAs quantum wells is calculated by using a variational approach.
The results have been obtained in the presence of a uniform magnetic field
, as a function of the potential symmetry, size of the quantum well and cou
pling parameter of the wells. We show that by increasing the applied magnet
ic field one can obtain large binding between electrons and holes which is
similar to the change in the dimensions of the structure. This behaviour in
the excitonic binding for different wells and barrier geometries can be us
ed to study these systems in regions of interest, without the need for the
growth of many different samples.