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Title: Photoionization cross-section in a GaAs spherical quantum shell: the effect of parabolic confining electric potentials
Authors: Tshipa M.
Sharma, Lalita
Pratap S.
Published in: European Physical Journal B
Abstract: Abstract: Theoretical study on binding energies due to a centred charged impurity and the associated photoionization cross-section (PCS) in a spherical shell are presented. This was achieved by solving the Schrödinger equation within the effective mass approach. Intrinsic to the spherical quantum shell may be the parabolic potential or the shifted parabolic potential, each superimposed on an infinite spherical square well. Results indicate that the parabolic potential enhances binding energies while the shifted parabolic potential diminishes them. These electric potentials considerably modify photoionization cross section in two ways. One, the parabolic potential blueshifts peaks of PCS while the shifted parabolic potential redshifts the peaks. Second, the parabolic potential decreases the magnitude of the peaks of the PCS while the shifted parabolic potential increases the magnitudes of the peaks. In essence, these two potential may be used to manipulate PCS in quantum structures. Graphic abstract: [Figure not available: see fulltext.] © 2021, The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature.
Citation: European Physical Journal B, 94(6)
Issue Date: 2021
Publisher: Springer Science and Business Media Deutschland GmbH
Keywords: Binding energy
Electric potential
Gallium arsenide
III-V semiconductors
Charged impurity
Dinger equation
Effective mass approach
Parabolic potential
Photoionization cross section
Quantum structure
Spherical shell
Theoretical study
ISSN: 14346028
Author Scopus IDs: 54685471800
Author Affiliations: Tshipa, M., University of Botswana, Private Bag 0022, Gaborone, Botswana
Sharma, L.K., University of Botswana, Private Bag 0022, Gaborone, Botswana
Pratap, S., Central University of Himachal Pradesh, Dharamshala, 176206, India
Corresponding Author: Tshipa, M.; University of Botswana, Private Bag 0022, Botswana; email:
Appears in Collections:Journal Publications [PH]

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