Exciton bound to a neutral donor in a parabolic quantum-well wire

Abstract

The properties of an exciton bound to a neutral donor (D0,X) in a parabolic GaAs quantum-well wire in the presence of a parallel magnetic field are investigated using the finite-difference method within the quasi-one-dimensional effective potential model. The magnetic field effects on the binding energy of the D0,X is studied for various parabolic potentials. The results show that high magnetic fields significantly increase the binding energy of the D0,X in the case of weak spatial confinement. In addition, we also found that with weak spatial confinement, the magnetic field has much stronger effects on the D0,X than it does on the biexciton, but with strong spatial confinement it has less effect. © 2009 American Institute of Physics.