Transport through a strongly correlated quantum dot with Fano interference
Transport through a strongly correlated quantum dot with Fano interference
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DOI：
10.1103/physrevb.72.165313
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发表时间：
2005-03
影响因子：
3.7
通讯作者：
B. H. Wu;J. C. Cao;K. Ahn
中科院分区：
文献类型：
--
作者：
B. H. Wu;J. C. Cao;K. Ahn
我们研究了一个强关联量子点的输运性质，该量子点连接在两根引线上，并带有一个侧面耦合的非相互作用量子点。用零温度、低偏压下可靠的从属玻色子平均场理论分析了输运性质。结果表明，输运性质是由近藤效应和法诺干涉这两种基本物理现象相互作用决定的。在存在点间耦合的情况下，线性电导将偏离么正极限，零偏压反常将被抑制。零偏压散粒噪声Fano因子随着点间耦合的增加而增大，并趋于泊松值。对于不同的边点能级，散粒噪声Fano因子表现出非单调行为，作为点间耦合的函数。
We present the transport properties of a strongly correlated quantum dot attached to two leads with a side coupled non-interacting quantum dot. Transport properties are analyzed using the slave boson mean field theory which is reliable in the zero temperature and low bias regime. It is found that the transport properties are determined by the interplay of two fundamental physical phenomena,i.e. the Kondo effects and the Fano interference. The linear conductance will depart from the unitary limit and the zero bias anomaly will be suppressed in the presence of interdot coupling. The zero bias shot noise Fano factor increases with the interdot coupling and tends to the Poisson value. The shot noise Fano factor shows a non-monotonic behavior as a function of the interdot coupling for various side dot energy levels.