Influences of a Side-Coupled Triple Quantum Dot on Kondo Transport Through a Quantum Dot

Influences of a Side-Coupled Triple Quantum Dot on Kondo Transport Through a Quantum Dot
复制标题

侧面耦合三量子点对通过量子点的近藤输运的影响

DOI:
10.1088/0253-6102/54/5/27
复制
发表时间:
2010-11
影响因子:
3.1
通讯作者:
Qin Zhi-Jie
Qin Zhi-Jie
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Jiang Zhao-Tan;Yang Yan-Nan;Qin Zhi-Jie

文献摘要

参考文献

相似文献

采用非平衡格林函数方法系统地研究了具有侧耦合三量子点结构的近藤型量子点的近藤输运特性。我们首先推导出电流、线性电导、传输系数和局域态密度的公式。然后进行了解析和数值研究,得到了一些通用电导性质。结果表明,电导谷的数量本质上是由侧耦合的量子点决定的,并且在不对称极限下最多等于侧耦合结构中包含的量子点的数量。在形成电导谷的过程中,侧耦合QD体系起主导作用,而近道型QD与侧耦合结构之间的耦合起辅助和不可或缺的作用。为了证明通用电导性质的有效性,考虑了另一种不同的侧耦合三重量子点结构。需要强调的是,这些普遍性质适用于理解这类具有任意多量子点侧结构的系统。
Kondo transport properties through a Kondo-type quantum dot (QD) with a side-coupled triple-QD structure are systematically investigated by using the non-equilibrium Green's function method. We firstly derive the formulae of the current, the linear conductance, the transmission coefficient, and the local density of states. Then we carry out the analytical and numerical studies and some universal conductance properties are obtained. It is shown that the number of the conductance valleys is intrinsically determined by the side-coupled QDs and at most equal to the number of the QDs included in the side-coupled structure in the asymmetric limit. In the process of forming the conductance valleys, the side-coupled QD system plays the dominant role while the couplings between the Kondo-type QD and the side-coupled structure play the subsidiary and indispensable roles. To testify the validity of the universal conductance properties, another different kinds of side-coupled triple-QD structures are considered. It should be emphasized that these universal properties are applicable in understanding this kind of systems with arbitrary many-QD side structures.
DOI: 10.1103/physrevb.72.165313
发表时间: 2005-03
期刊: Physical Review B
影响因子: 3.7
作者:
B. H. Wu;J. C. Cao;K. Ahn
通讯作者: B. H. Wu;J. C. Cao;K. Ahn
DOI: 10.1103/physrevlett.68.2512
发表时间: 1992-04-20
影响因子: 8.6
作者:
MEIR, Y;WINGREEN, NS
通讯作者: WINGREEN, NS
DOI: 10.1103/physrevb.70.035319
发表时间: 2004-07-01
期刊: PHYSICAL REVIEW B
影响因子: 3.7
作者:
Kobayashi, K;Aikawa, H;Iye, Y
通讯作者: Iye, Y
DOI: 10.1103/physrevlett.94.086602
发表时间: 2004-04
影响因子: 8.6
作者:
P. Simon;Rosa López;Y. Oreg
通讯作者: P. Simon;Rosa López;Y. Oreg
DOI: 10.1103/physrevlett.82.3508
发表时间: 1998-11
影响因子: 8.6
作者:
A. Georges;Y. Meir
通讯作者: A. Georges;Y. Meir