Interference effect in multilevel transport through a quantum dot
Interference effect in multilevel transport through a quantum dot
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DOI：
10.1143/jpsj.73.3235
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发表时间：
2004-12-01
影响因子：
1.7
通讯作者：
Iye, Y
中科院分区：
文献类型：
--
作者：
Aikawa, H;Kobayashi, K;Iye, Y
我们给出了实验结果和模型来解决在通过量子点的传输中观察到的“同相库仑峰”问题。在库仑阻塞和开放点之间的边缘区域，我们观察到通过点内的两个能级的Fano型干涉，这表现在激发光谱中的两个重叠的类库仑金刚石结构。其中一个能级与引线强耦合，电子的相位被锁定，我们通过Fano非对称参数的符号检测到了大菱形顶点和中心的相位变化，从而支持了上述推论。
We present experimental results and a model to solve the problem of "in-phase Coulomb peaks" observed in transport through a quantum dot. In the marginal region between the Coulomb-blockade and open-dot, we have observed Fano-type interference through two energy levels inside the dot, which manifest themselves in two overlapped Coulomb-diamond-like structures in the excitation spectrum. One of the two levels is strongly coupled to the leads and the phase of traversing electrons is locked to it. We have detected the phase change at the vertices and the centers of the larger diamonds through the sign of Fano's asymmetric parameters supporting the above deduction.