Green's function technique for studying electron flow in two-dimensional mesoscopic samples
Green's function technique for studying electron flow in two-dimensional mesoscopic samples
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DOI：
10.1103/physrevb.72.235304
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发表时间：
2005-12-01
影响因子：
3.7
通讯作者：
Bruno, P
中科院分区：
文献类型：
--
作者：
Metalidis, G;Bruno, P
通过扫描探针实验，可以可视化二维电子气中的电子流。在本文中，绿色函数技术，有效地模拟这样的实验。通过计算电流分布进一步促进了实验的解释。此外，提出了一种测量局域化学势的替代成像方法。作为应用，研究了量子点接触中的电子流。再现了实验中看到的所有特征，并预测了电子流相干束交叉产生的干涉效应。
With scanning probe experiments, it became possible to visualize electron flow in a two-dimensional electron gas. In this paper, a Green's function technique for efficient simulation of such experiments is presented. Interpretation of the experiments is further facilitated by a calculation of the current distribution. Furthermore, an alternative imaging method is put forward for measuring the local chemical potential. As an application, electron flow through a quantum point contact is studied. All features seen in experiments are reproduced, and an interference effect is predicted resulting from the crossing of coherent beams of electron flow.