Donor-impurity related photoionization cross section in GaAs / Ga 1 -cdouble quantum rings: Effects of geometry and hydrostatic pressure

H. M. Baghramyan; M. G. Barseghyan; A. A. Kirakosyan; D. Laroze; C. A. Duque

doi:10.1016/j.physb.2014.05.034

Donor-impurity related photoionization cross section in GaAs / Ga 1 _-c^double quantum rings: Effects of geometry and hydrostatic pressure

H. M. Baghramyan
, M. G. Barseghyan
, A. A. Kirakosyan
, D. Laroze
, C. A. Duque

Institute of Higher Research

Yerevan State University
Universidad de Antioquia

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

The donor-impurity related photoionization cross section in GaAs/Ga1 _-x^AlxAs three-dimensional concentric double quantum rings is investigated. The photoionization cross section dependence on the incident photon energy is studied considering the effects of hydrostatic pressure, variations of aluminum concentration, geometries of the structure, and impurity position. The interpretation of the dipole matrix element, which reflects the photoionization probability, is also given. We have found that these parameters can lead to both redshift and blueshift of the photoionization spectrum and also influence the cross section peak value.

Original language	English
Pages (from-to)	193-198
Number of pages	6
Journal	Physica B: Condensed Matter
Volume	449
DOIs	https://doi.org/10.1016/j.physb.2014.05.034
State	Published - 15 Sep 2014

Keywords

Binding energy
Double quantum ring
Hydrostatic pressure
Photoionization cross section

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10.1016/j.physb.2014.05.034

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@article{efb7e4c4e1c148e984a3ce64700e7699,

title = "Donor-impurity related photoionization cross section in GaAs / Ga 1 -cdouble quantum rings: Effects of geometry and hydrostatic pressure",

abstract = "The donor-impurity related photoionization cross section in GaAs/Ga1 -xAlxAs three-dimensional concentric double quantum rings is investigated. The photoionization cross section dependence on the incident photon energy is studied considering the effects of hydrostatic pressure, variations of aluminum concentration, geometries of the structure, and impurity position. The interpretation of the dipole matrix element, which reflects the photoionization probability, is also given. We have found that these parameters can lead to both redshift and blueshift of the photoionization spectrum and also influence the cross section peak value.",

keywords = "Binding energy, Double quantum ring, Hydrostatic pressure, Photoionization cross section",

author = "Baghramyan, \{H. M.\} and Barseghyan, \{M. G.\} and Kirakosyan, \{A. A.\} and D. Laroze and Duque, \{C. A.\}",

year = "2014",

month = sep,

day = "15",

doi = "10.1016/j.physb.2014.05.034",

language = "English",

volume = "449",

pages = "193--198",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

}

TY - JOUR

T1 - Donor-impurity related photoionization cross section in GaAs / Ga 1 -cdouble quantum rings

T2 - Effects of geometry and hydrostatic pressure

AU - Baghramyan, H. M.

AU - Barseghyan, M. G.

AU - Kirakosyan, A. A.

AU - Laroze, D.

AU - Duque, C. A.

PY - 2014/9/15

Y1 - 2014/9/15

N2 - The donor-impurity related photoionization cross section in GaAs/Ga1 -xAlxAs three-dimensional concentric double quantum rings is investigated. The photoionization cross section dependence on the incident photon energy is studied considering the effects of hydrostatic pressure, variations of aluminum concentration, geometries of the structure, and impurity position. The interpretation of the dipole matrix element, which reflects the photoionization probability, is also given. We have found that these parameters can lead to both redshift and blueshift of the photoionization spectrum and also influence the cross section peak value.

AB - The donor-impurity related photoionization cross section in GaAs/Ga1 -xAlxAs three-dimensional concentric double quantum rings is investigated. The photoionization cross section dependence on the incident photon energy is studied considering the effects of hydrostatic pressure, variations of aluminum concentration, geometries of the structure, and impurity position. The interpretation of the dipole matrix element, which reflects the photoionization probability, is also given. We have found that these parameters can lead to both redshift and blueshift of the photoionization spectrum and also influence the cross section peak value.

KW - Binding energy

KW - Double quantum ring

KW - Hydrostatic pressure

KW - Photoionization cross section

UR - https://www.scopus.com/pages/publications/84902322020

U2 - 10.1016/j.physb.2014.05.034

DO - 10.1016/j.physb.2014.05.034

M3 - Article

AN - SCOPUS:84902322020

SN - 0921-4526

VL - 449

SP - 193

EP - 198

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

ER -

Donor-impurity related photoionization cross section in GaAs / Ga 1 _-c^double quantum rings: Effects of geometry and hydrostatic pressure

Abstract

Keywords

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