Title: Photoionization cross section in a spherical quantum dot: Effects of some parabolic confining electric potentials
Author(s):

M. Tshipa (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.

Key words: photoionization cross section, electric confining potential, spherical quantum dot, hydrogenic impurity
PACS: 71.55.Eq, 73.21.La, 73.22.Dj

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