Quantum dots formed in a GaAs/AlGaAs quantum ring

被引：12
|
作者：
Muehle, A. [1 ]
Wegscheider, W. [2 ]
Haug, R. J. [1 ]
机构：
[1] Leibniz Univ Hannover, Inst Festkorperphys, D-30167 Hannover, Germany
[2] Univ Regensburg, Inst Angew & Expt Phys 2, D-93040 Regensburg, Germany
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 01期
关键词：
D O I：
10.1063/1.2833694
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate the tunability of a GaAs/AlGaAs quantum ring showing coherent Aharonov-Bohm oscillations up to a gate voltage regime where the ring splits into three quantum dots. This is explained based on the structure's special confinement potential. We characterized the dots by analyzing the corresponding sets of Coulomb blockade lines. Additionally, the spatial configuration of the dots was confirmed by charge measurements using an adjacent quantum point contact. (c) 2008 American Institute of Physics.
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页数：3
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