Electron states of semiconductor quantum ring with geometry and size variations

被引：18
作者：
Filikhin, I
Deyneka, E
Melikyan, H
Vlahovic, B
机构：
[1] N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA
[2] N Carolina A&T Univ, Ctr Adv Mat & Smart Struct, Greensboro, NC 27411 USA
来源：
MOLECULAR SIMULATION | 2005年 / 31卷 / 11期
基金：
美国国家航空航天局;
关键词：
nanoscale materials and structures; electron states in nanoscale systems; single particle states; quantum rings;
D O I：
10.1080/08927020500269445
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Heterostructured semiconductor quantum rings (QR) are studied by a three-dimensional model in a single sub-band approach with energy dependent electron effective mass. Nonlinear confinement energy problem is numerically solved by the finite element method. Effects of boundary conditions corresponding to various QR/substrate configurations are analyzed. General relation for the size dependence of the QR confined energy is derived. The contribution to confinement energy due to the presence of external magnetic field is compared with the effect of variation of QR geometrical parameters. Applicability of the model is tested by comparison with experimental data.
引用
收藏
页码：779 / 785
页数：7
相关论文
共 17 条
  • [1] SIGNIFICANCE OF ELECTROMAGNETIC POTENTIALS IN THE QUANTUM THEORY
    AHARONOV, Y
    BOHM, D
    [J]. PHYSICAL REVIEW, 1959, 115 (03): : 485 - 491
  • [2] Far-infrared spectroscopy of nanoscopic InAs rings
    Emperador, A
    Pi, M
    Barranco, M
    Lorke, A
    [J]. PHYSICAL REVIEW B, 2000, 62 (07): : 4573 - 4577
  • [3] Energy dependent effective mass model of InAs/GaAs quantum ring
    Filikhin, I
    Deyneka, E
    Vlahovic, B
    [J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING, 2004, 12 (06) : 1121 - 1130
  • [4] Applicability of the k•p method to the electronic structure of quantum dots
    Fu, HX
    Wang, LW
    Zunger, A
    [J]. PHYSICAL REVIEW B, 1998, 57 (16): : 9971 - 9987
  • [5] GARSIA JM, 1997, APPL PHYS LETT, V71, P2014
  • [6] BAND STRUCTURE OF INDIUM ANTIMONIDE
    KANE, EO
    [J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 1957, 1 (04) : 249 - 261
  • [7] Electronic structure of a magnetic quantum ring
    Kim, N
    Ihm, G
    Sim, HS
    Chang, KJ
    [J]. PHYSICAL REVIEW B, 1999, 60 (12): : 8767 - 8772
  • [8] Landau LD, 1977, QUANTUM MECH
  • [9] Levinshtein M. E., 1999, Handbook Series on Semiconductor Parameters
  • [10] Electronic states of InAs/GaAs quantum ring
    Li, SS
    Xia, JB
    [J]. JOURNAL OF APPLIED PHYSICS, 2001, 89 (06) : 3434 - 3437
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