The role of confinement and shape on the binding energy of an electron in a quantum dot

被引：7

作者：

Sucu, S. ^{[1
]}

Mese, A. I. ^{[1
]}

Okan, S. E. ^{[2
]}

机构：

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

[2] Kirklareli Univ, Dept Elect Educ, Kirklareli, Turkey

来源：

PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES | 2008年 / 40卷 / 08期

关键词：

quantum dots; cubic and cylindrical geometry; electric field;

D O I：

10.1016/j.physe.2007.12.017

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The impurity ground state binding energy in cubic and cylindrical GaAs/AlAs quantum dots has been calculated using a variational procedure within the effective mass approximation. We exploit the impurity ground state energy under an external electric field strongly affected by the anisotropy of the quantum dots more than their shapes. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2698 / 2702

页数：5

共 23 条

[1] Effect of a parabolic potential on the impurity binding energy in spherical quantum dots [J].

Bose, C ;

Sarkar, CK .

PHYSICA B-CONDENSED MATTER, 1998, 253 (3-4) :238-241

[2] Shape effects on the one- and two-electron ground state in ellipsoidal quantum dots [J].

Cantele, G ;

Ninno, D ;

Iadonisi, G .

PHYSICAL REVIEW B, 2001, 64 (12)

[3] Magnetic field effect on the binding energy of a hydrogenic impurity in cylindrical quantum dot [J].

Charrour, R ;

Bouhassoune, M ;

Fliyou, M ;

Nougaoui, A .

PHYSICA B-CONDENSED MATTER, 2000, 293 (1-2) :137-143

[4] 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

[5] BAND-EDGE ABSORPTION AND LUMINESCENCE OF NONSPHERICAL NANOMETER-SIZE CRYSTALS [J].

EFROS, AL ;

RODINA, AV .

PHYSICAL REVIEW B, 1993, 47 (15) :10005-10007

[6] Band-edge exciton in quantum dots of semiconductors with a degenerate valence band: Dark and bright exciton states [J].

Efros, AL ;

Rosen, M ;

Kuno, M ;

Nirmal, M ;

Norris, DJ ;

Bawendi, M .

PHYSICAL REVIEW B, 1996, 54 (07) :4843-4856

[7]

El Messaoudi K, 2002, PHYS STATUS SOLIDI B, V233, P270, DOI 10.1002/1521-3951(200209)233:2<270::AID-PSSB270>3.0.CO

[8]

2-U

[9] EFFECT OF MAGNETIC-FIELD ON THE ENERGY-LEVELS OF A HYDROGENIC IMPURITY CENTER IN GAAS GA1-XALXAS QUANTUM-WELL STRUCTURES [J].

GREENE, RL ;

BAJAJ, KK .

PHYSICAL REVIEW B, 1985, 31 (02) :913-918

[10] Effects of electric field and hydrostatic pressure on donor binding energies in a spherical quantum dot [J].

Jayam, SG ;

Navaneethakrishnan, K .

SOLID STATE COMMUNICATIONS, 2003, 126 (12) :681-685

← 1 2 3 →