EFFECT OF THE ELECTRIC-FIELD ON A HYDROGENIC IMPURITY IN A QUANTUM-WELL WIRE

The ground state binding energy, the energy shift and the electric dip ole moment of a hydrogenic impurity in a quantum-well wire subjected t o an external electric field have been calculated. The variational ans atz for the wave function of the electron, that takes into account the effect of the finite barrier height, has been used. Numerical results for the case of GaAs quantum-well wire show a large influence of the electric field, the finite barrier height and the impurity position on the binding energy, the energy shift and the electric dipole moment.