Shot noise of the hybrid double-quantum-dot Aharonov-Bohm interferometer coupled to normal and superconductive terminals
Shot noise of the hybrid double-quantum-dot Aharonov-Bohm interferometer coupled to normal and superconductive terminals
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DOI：
10.1209/0295-5075/99/48005
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发表时间：
2012-08
期刊：
影响因子：
--
通讯作者：
H. Zhao;J. Wang;Q. Wang
中科院分区：
文献类型：
--
作者：
H. Zhao;J. Wang;Q. Wang
采用非平衡格林函数方法研究了连接正常金属和超导体的双量子点干涉仪的射散噪声。栅极电压控制散粒噪声的Aharonov-Bohm振荡结构，通过改变栅极电压可以将振荡峰转换为谷。干扰效应和偏置电压抑制了安德烈夫反射产生的散粒噪声。相对于栅极电压的非对称范诺因子表现为峰谷谐振结构。
The shot noise of double-quantum-dot interferometer connected to normal metal and superconductor is investigated by employing the nonequilibrium Green's function approach. The gate voltages control the Aharonov-Bohm oscillation structure of shot noise, and the oscillation peaks can be converted to valleys by changing the gate voltages. The Andreev-reflection-generated shot noise is suppressed resulting from the interference effect and bias voltages. The asymmetric Fano factor with respect to the gate voltages exhibits the peak-valley resonant structure.