Antiresonance of electron tunneling through a four-quantum-dot ring with two side-coupled quantum dots

被引：2
|
作者：
Zhang, Di [1 ]
Ma, Jia-ning [1 ]
Li, Hua [1 ]
Fu, Shu-fang [1 ]
Wang, Xuan-Zhang [1 ]
机构：
[1] Harbin Normal Univ, Dept Phys, Harbin 150001, Peoples R China
来源：
PHYSICS LETTERS A | 2008年 / 372卷 / 17期
关键词：
quantum dots; ring-shaped array; electronic transport; antiresonant tunneling;
D O I：
10.1016/j.physleta.2008.01.014
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Making use of the equation of motion method and Keldysh Green function technique, we obtain the current formula for a two-terminal four-quantum-dot-ring with two side-coupled quantum dots under a DC bias voltage. Antiresonance and resonance of electron tunneling is studied by numerical calculations. Only when the quantum dots in the ring has the same single electron energy level with that of the side-coupled quantum dots, i.e. epsilon(0)(i) = epsilon(0) and both side-coupling are turned on at the same time, the antiresonance appear exactly at epsilon(0). (c) 2008 Elsevier B.V. All rights reserved.
引用
收藏
页码：3085 / 3088
页数：4
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