Condensed Matter Physics, 2017, vol. 20, No. 2, 23703
Photoionization cross section in a spherical quantum dot: Effects of some parabolic confining electric potentials
(University of Botswana, Corner of Notwane and Mobuto Road, P/Bag 00704, Gaborone, Botswana)
A theoretical investigation of the effects of spatial variation of confining electric potential on photoionization cross section (PCS) in a spherical quantum dot is presented. The potential profiles
considered here are the shifted parabolic potential and the inverse lateral shifted parabolic potential compared with the well-studied parabolic potential. The primary findings are that parabolic potential
and the inverse lateral shifted parabolic potential blue shift the peaks of the PCS while the shifted parabolic potential causes a red shift.
photoionization cross section, electric confining potential, spherical quantum dot, hydrogenic impurity
71.55.Eq, 73.21.La, 73.22.Dj