Non-parabolic model for InAs/GaAs quantum dot capacitance spectroscopy

被引：9
|
作者：
Filikhin, I.
Deyneka, E.
Vlahovic, B.
机构：
[1] N Carolina Agr & Tech State Univ, Ctr Adv Mat & Smart Struct, Greensboro, NC 27411 USA
[2] N Carolina Cent Univ, Dept Phys, Durham, NC 27707 USA
来源：
SOLID STATE COMMUNICATIONS | 2006年 / 140卷 / 9-10期
基金：
美国国家航空航天局;
关键词：
quantum dots; single electron states; Coulomb blockade; single-electron tunneling; EFFECTIVE-MASS; RING; ELECTRONS; STATES;
D O I：
10.1016/j.ssc.2006.08.052
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
InAs/GaAs quantum dot electron spectra obtained from the capacitance-voltage measurements by B.T. Miller et al. [B.T. Miller, W. Hansen, S. Manus, R.J. Luyken, A. Lorke, J.P. Kotthaus, S. Huant, G. Medeiros-Ribeiro, P.M. Petroff, Phys. Rev. B 56 (1997) 6764] are quantitatively interpreted by applying a three-dimensional model of a semiconductor quantum dot with energy-dependent electron effective mass and finite confinement potential. The Coulomb interaction between tunnelled electrons is taken into account by perturbation theory. The observed significant increase in the electron effective mass of the quantum dot in respect to its bulk value is explained by the non-parabolic effect. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码：483 / 486
页数：4
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