The intensity and direction of the electric field effects on off-center shallow-donor impurity binding energy in wedge-shaped cylindrical quantum dots

被引:23
作者
Belamkadem, L. [1 ]
Mommadi, O. [1 ]
Boussetta, R. [1 ]
Chouef, S. [1 ]
Chnafi, M. [1 ]
El Moussaouy, A. [1 ,2 ]
Vinasco, J. A. [3 ]
Laroze, D. [4 ]
Duque, C. A. [3 ]
Kenfack-Sadem, C. [5 ]
Tsiaze, R. M. Keumo [6 ]
Mbognou, F. C. Fobasso [5 ]
El-Miad, A. Kerkour [7 ]
机构
[1] Univ Mohamed I, Fac Sci, Dept Phys, Lab Mat Waves Energy & Environm,OAPM Grp, Oujda 60000, Morocco
[2] Reg Ctr Profess Educ & Training, Lab Innovat Sci Technol & Educ, Oujda 60000, Morocco
[3] Univ Antioquia UdeA, Fac Ciencias Exactas & Nat, Grp Mat Condensada UdeA, Inst Fis, Calle 70 52-21, Medellin, Colombia
[4] Univ Tarapaca, Dept Fis, FACI, Casilla 7D, Arica 1000000, Chile
[5] Univ Dschang, Fac Sci, Dept Phys, Lab Condensed Matter Elect & Signal Proc LAMACET, POB 67, Dschang, Cameroon
[6] Univ Yaounde I, Fac Sci, Dept Phys, Lab Mech Mat & Struct, POB 812, Yaounde, Cameroon
[7] Univ Mohamed I, Fac Sci, Dept Phys, Lab Mat Waves Energy & Environm,MEGCE Grp, Oujda 60000, Morocco
关键词
Wedge-shaped cylindrical quantum dot; Donor impurity; Binding energy; Electric field; TEMPERATURE; EMISSION; STATES;
D O I
10.1016/j.tsf.2022.139396
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Taking into account an infinite confinement potential, including the influence of external electric field applied in different directions, we have systematically examined the different factors that lead to changes in the ground state binding energy between the hydrogen impurity and the electron, which are confined in a wedge-shaped cylindrical quantum dot (WSCQD) of radius R, height H and azimuthal angle theta m. The resolution of the Schro & BULL;dinger equation in three dimensions is achieved by the numerical finite difference method. The binding energy is calculated for several quantum dot geometry, various electric field direction, and different position of the impurity located on the first rectangular surface or inside the WSCQD. We have obtained that the direction of the electric field has an important influence on the binding energy of the off-center impurity. We have discussed in detail the weak effect of the radial electric field in the critical value of the WSCQD azimuthal angle theta m = 76.20 & LCIRC; for R = 30 nm and H = 50 nm. The competition between the different effects, such as the electric field direction, the impurity position, and the no-symmetry of the WSCQD, on the electron-impurity distance, is physically interpreted in this paper. To make a more self-contained work, the finite confinement potential effects have also been discussed. Calculations have also been validated by using the finite element method.
引用
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页数:14
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共 44 条
[1]   Optical properties and conductivity of biased GaAs quantum dots [J].
Aqiqi, S. ;
Duque, C. A. ;
Radu, A. ;
Gil-Corrales, J. A. ;
Morales, A. L. ;
Vinasco, J. A. ;
Laroze, D. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2022, 138
[2]   Electric field effect on the energy of an off-centre donor in quantum crystallites [J].
Assaid, E ;
Feddi, E ;
Khaidar, M ;
Dujardin, E ;
Stébé, B .
PHYSICA SCRIPTA, 2001, 63 (04) :329-335
[3]   Dark field transmission electron microscope images of III-V quantum dot structures [J].
Beanland, R .
ULTRAMICROSCOPY, 2005, 102 (02) :115-125
[4]   Electronic properties and hydrogenic impurity binding energy of a new variant quantum dot [J].
Belamkadem, L. ;
Mommadi, O. ;
Vinasco, J. A. ;
Laroze, D. ;
El Moussaouy, A. ;
Chnafi, M. ;
Duque, C. A. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2021, 129
[5]   Deformation and size effects on electronic properties of toroidal quantum dot in the presence of an off-center donor atom [J].
Boussetta, R. ;
Mommadi, O. ;
Belamkadem, L. ;
Chouef, S. ;
Hbibi, M. ;
El Moussaouy, A. ;
Vinasco, J. A. ;
Duque, C. A. ;
Satori, H. ;
Kenfack-Sadem, C. ;
Tsiaze, R. M. Keumo ;
Mbognou, F. C. Fobasso ;
El-Miad, A. Kerkour .
MICRO AND NANOSTRUCTURES, 2022, 165
[6]   Numerical modeling of linear and nonlinear optical properties in hexagonal core-shell shape ZnSe/ZnSxSe1-x quantum dot [J].
Brahim, T. ;
Bouazra, A. ;
Said, M. .
OPTIK, 2021, 225
[7]   Energy and stability of negatively charged trion in cylindrical quantum dot under temperature effect [J].
Chnafi, M. ;
El Moussaouy, A. ;
Mommadi, O. ;
Belamkadem, L. .
PHYSICA B-CONDENSED MATTER, 2020, 594
[8]   Excited-states of hydrogenic-like impurities in InGaN-GaN spherical QD: Electric field effect [J].
El Ghazi, Haddou ;
Jorio, Anouar .
PHYSICA B-CONDENSED MATTER, 2013, 430 :81-83
[9]   Theoretical investigation of stark effect on shallow donor binding energy in InGaN spherical QD-QW [J].
El Ghazi, Haddou ;
Jorio, Anouar ;
Zorkani, Izeddine .
PHYSICA B-CONDENSED MATTER, 2013, 422 :47-50
[10]   Stark effect-dependent of ground-state donor binding energy in InGaN/GaN parabolic QWW [J].
El Ghazi, Haddou ;
Zorkani, Izeddine ;
Jorio, Anouar .
PHYSICA B-CONDENSED MATTER, 2013, 412 :87-90