Magnetic trapping of charge carriers in the quantum wells of an asymmetric two-well semiconductor structure
Skorikov M. L. , Zasavitskii I.I., Kazakov I. P., Sadof'ev Yu. G., Sibel'din N. N., Tsvetkov V. A. , Tsekhosh V. I.
It was found that in a magnetic field applied parallel to the layers of a quantum-size structure a luminescence line associated with the second quantum-well subband of a two-well system is excited. This effect is due to the magnetic localization of charge carriers in quantum wells which is accompanied by a weakening of the tunneling coupling between the wells. The results for a structure with strong tunneling coupling between the wells are described satisfactorily by a simple semiquantitative model with parabolic wells. A nonmonotonic magnetic-field dependence of the intensities of the luminescence lines was observed for a sample with weakly coupled wells. © 1995 American Institute of Physics.