Effect of axial electric field on the binding energy of a shallow   hydrogenic impurity in a Quantum Well Wire
  We present a study of the effect of an electric field on the binding energy of a shallow hydrogenic impurity in GaAs/Ga_{1-x}Al_{x}As quantum well wires. The wire is considered to be of length L and radius R and the electric field F is applied along the z-axis, the axis of the wire. 
I F I Mikhail and T G Emam