Effect of interdiffusion and magnetic field on two-electron states in Gaussian-shaped double quantum rings

被引：4
作者：
Aziz-Aghchegala, V. L. [1 ]
Mughnetsyan, V. N. [2 ]
Kirakosyan, A. A. [2 ]
机构：
[1] Islamic Azad Univ, Urmia Branch, Dept Phys, Orumiyeh, Iran
[2] Yerevan State Univ, Dept Solid State Phys, Alex Manoogian 1, Yerevan 0025, Armenia
来源：
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2017年 / 88卷
关键词：
Gaussian-shaped quantum ring; Magnetic field; lnterdiffusion; Coulomb interaction; PERSISTENT CURRENTS; OPTICAL-ABSORPTION; ELECTRONIC STATES; DOTS; SUPERLATTICE; SPECTRA; SINGLE; LOOP;
D O I：
10.1016/j.physe.2017.01.005
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The effects of interdiffusion and electrons' Coulomb interaction on the energy spectrum in Gaussian-shaped single and double quantum rings in the presence of magnetic field has been considered in the framework of exact diagonalization method. The one-electron energies as functions of magnetic field for different values of diffusion parameter have been obtained. The two-electron energies and electron probability density distributions are obtained as well. It is shown that the energy oscillations which are more pronounced for a single quantum ring, smooth out due to the interdiffusion. The Coulomb interaction transforms the crossings of the two-electron levels to anticrossings and can lead to the appearance of an additional level between the anticrossing levels.
引用
收藏
页码：157 / 163
页数：7
相关论文
共 34 条
[1]   Investigation of thermal interdiffusion in InAs/In0.15Ga0.85As/GaAs quantum dot-in-a-well heterostructures [J].
Agarwal, A. ;
Srujan, M. ;
Chakrabarti, S. ;
Krishna, S. .
JOURNAL OF LUMINESCENCE, 2013, 143 :96-100
[2]   TWO ELECTRONIC STATES IN A QUANTUM RING: MATHIEU EQUATION APPROACH [J].
Aghekyan, N. G. ;
Kazaryan, E. M. ;
Petrosyan, L. S. ;
Sarkisyan, H. A. .
INTERNATIONAL CONFERENCE ON THEORETICAL PHYSICS DUBNA-NANO 2010, 2010, 248
[3]   SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY [J].
AHARONOV, Y ;
BOHM, D .
PHYSICAL REVIEW, 1959, 115 (03) :485-491
[4]   Strain and band-mixing effects on the excitonic Aharonov-Bohm effect in In(Ga)As/GaAs ringlike quantum dots [J].
Arsoski, Vladimir V. ;
Tadic, Milan Z. ;
Peeters, Francois M. .
PHYSICAL REVIEW B, 2013, 87 (08)
[5]   Effect of interdiffusion on nonlinear intraband light absorption in Gaussian-shaped double quantum rings [J].
Aziz-Aghchegala, V. L. ;
Mughnetsyan, V. N. ;
Kirakosyan, A. A. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2015, 70 :210-216
[6]   Effect of interdiffusion on electronic states of strain-free Gaussian-shaped double quantum ring superlattice [J].
Aziz-Aghchegala, V. L. ;
Mughnetsyan, V. N. ;
Kirakosyan, A. A. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2015, 65 :30-35
[7]   Effect of interdiffusion on electronic states in one-layer quantum ring superlattice [J].
Aziz-Aghchegala, V. L. ;
Mughnetsyan, V. N. ;
Kirakosyan, A. A. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2014, 64 :51-56
[8]   The influence of inter-diffusion on electron states in quantum dots [J].
Barker, JA ;
O'Reilly, EP .
PHYSICA E, 1999, 4 (03) :231-237
[9]   Impurity-modulated Aharonov-Bohm oscillations and intraband optical absorption in quantum dot-ring nanostructures [J].
Barseghyan, M. G. ;
Manaselyan, A. Kh. ;
Laroze, D. ;
Kirakosyan, A. A. .
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2016, 81 :31-36
[10]   JOSEPHSON BEHAVIOR IN SMALL NORMAL ONE-DIMENSIONAL RINGS [J].
BUTTIKER, M ;
IMRY, Y ;
LANDAUER, R .
PHYSICS LETTERS A, 1983, 96 (07) :365-367
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