Separately contacted edge states: A spectroscopic tool for the investigation of the quantum Hall effect
Separately contacted edge states: A spectroscopic tool for the investigation of the quantum Hall effect
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单独接触的边缘态：用于研究量子霍尔效应的光谱工具
DOI：
10.1103/physrevb.65.075303
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发表时间：
2001
影响因子：
3.7
通讯作者：
V. Dolgopolov
中科院分区：
文献类型：
--
作者：
A. Wuertz;R. Wildfeuer;A. Lorke;E. Deviatov;V. Dolgopolov
利用准corbino样品几何和交叉门技术的创新组合，我们开发了一种方法，使我们能够单独接触量子霍尔体系中的单边通道并研究它们之间的平衡。通过四点电阻测量，我们直接获得了边缘区域的能量和几何结构、电流通过朗道输运的平衡长度以及自旋间隙的信息。基于几乎自由选择参与边缘通道的数量及其相互作用长度，系统地研究参数空间成为可能。
Using an innovative combination of a quasi-Corbino sample geometry and the cross-gate technique, we have developed a method that enables us to separately contact single edge channels in the quantum Hall regime and investigate equilibration among them. Performing four-point resistance measurements, we directly obtain information on the energetic and geometric structure of the edge region and the equilibration length for current transport across the Landau as well as the spin gap. Based on an almost free choice in the number of participating edge channels and their interaction length a systematic investigation of the parameter space becomes possible.