Fano effect in a T-shaped double quantum dot structure in the presence of Rashba spin-orbit coupling

被引：17
|
作者：
Gong, Weijiang [1 ]
Zheng, Yisong [1 ]
Liu, Yu [1 ]
Kariuki, Francis N. [1 ]
Lue, Tianquan [1 ]
机构：
[1] Jilin Univ, Dept Phys, Changchun 130023, Peoples R China
来源：
PHYSICS LETTERS A | 2008年 / 372卷 / 16期
关键词：
quantum dot; Fano effect; Rashba interaction;
D O I：
10.1016/j.physleta.2008.01.004
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The influence of Rashba spin-orbit coupling on the Fano lineshape of the conductance spectrum in a T-shaped double quantum dot structure is theoretically studied. By second-quantizing the electron Hamiltonian in this structure, it is found that the Rashba interaction brings about a spin-flip interdot hopping term. With the enhancement of the Rashba interaction, this term separates the two resonant peaks in the conductance spectrum from each other. More importantly, it causes the broadening of the narrow Fano peak, and the narrowing of the broader peak. Finally, the asymmetric Fano lineshape changes into a symmetric profile in the global conductance spectrum. (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：2934 / 2940
页数：7
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