Simultaneous effects of electric and magnetic fields in a GaAs/AlAs spherical quantum dot with a hydrogenic impurity

被引：20

作者：

Dane, C. ^{[2
,3
]}

Akbas, H. ^{[1
,3
]}

Minez, S. ^{[1
]}

Guleroglu, A. ^{[2
]}

机构：

[1] Trakya Univ, Dept Phys, TR-22030 Edirne, Turkey

[2] Trakya Univ, Dept Math, TR-22030 Edirne, Turkey

[3] Trakya Univ, Int Ctr Phys & Appl Math, TR-22030 Edirne, Turkey

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2010年 / 42卷 / 07期

关键词：

Turning point; Spherical dot; Normalized binding energy; BINDING-ENERGY; DONOR STATES;

D O I：

10.1016/j.physe.2010.02.007

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, the effects of electric and magnetic fields on the ground state of a hydrogenic on-centre donor in a GaAs/AlAs spherical quantum dot have been studied. A variational approach within the framework of effective mass approximation is used in the calculations. Overall, the analysis shows that a proper choice of the dot radius and the electric and magnetic fields can largely change the normalized binding energy, which in turn may be used to feel the small change in dot radius and thus detect different magnetic field strengths. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：1901 / 1904

页数：4

共 27 条

[1] The effect of magnetic field in a GaAs/AlAs spherical quantum dot with a hydrogenic impurity [J].

Akbas, H. ;

Dane, C. ;

Guleroglu, A. ;

Minez, S. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2009, 41 (04) :605-608

[2] Donor binding energies and spin-orbit coupling in a spherical quantum dot [J].

Bella, RSD ;

Navaneethakrishnan, K .

SOLID STATE COMMUNICATIONS, 2004, 130 (11) :773-776

[3] Effect of conduction band non-parabolicity on the donor states in GaAs-(Al,Ga)As spherical quantum dots [J].

Bose, C. ;

Midya, K. ;

Bose, M. K. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2006, 33 (01) :116-119

[4] Electric field induced shifts of electronic energy levels in spherical quantum dot [J].

Bose, C ;

Chakraborty, C ;

Sarkar, CK .

SOLID-STATE ELECTRONICS, 1997, 41 (09) :1383-1385

[5] HYDROGENIC IMPURITY STATES IN QUANTUM DOTS AND QUANTUM WIRES [J].

CHUU, DS ;

HSIAO, CM ;

MEI, WN .

PHYSICAL REVIEW B, 1992, 46 (07) :3898-3905

[6] Effect of electron-phonon interaction on the impurity binding energy in a quantum wire [J].

Chuu, DS ;

Chen, YN ;

Lin, YK .

PHYSICA B, 2000, 291 (3-4) :228-235

[7] Electric field effect in a GaAs/AlAs spherical quantum dot [J].

Dane, C. ;

Akbas, H. ;

Minez, S. ;

Guleroglu, A. .

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 2008, 41 (02) :278-281

[8] IMPURITY STATES IN A SPHERICAL GAAS-GA1-XALXAS QUANTUM-DOT - EFFECTS OF THE SPATIAL VARIATION OF DIELECTRIC SCREENING [J].

DENG, ZY ;

GUO, JK ;

LAI, TR .

PHYSICAL REVIEW B, 1994, 50 (08) :5736-5739

[9] Effects of an applied electric field on the binding energy of shallow donor impurities in GaAs low-dimensional systems [J].

Duque, CA ;

Montes, A ;

Morales, AL ;

PorrasMontenegro, N .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1997, 9 (27) :5977-5987

[10] Magnetic field influence on the polarisability of donors in quantum crystallites [J].

Feddi, E ;

Assaid, E ;

Dujardin, F ;

Stébé, B ;

Diouri, J .

PHYSICA SCRIPTA, 2000, 62 (01) :88-91

← 1 2 3 →