Selective population and detection of edge channels in the fractional quantum Hall regime.
Selective population and detection of edge channels in the fractional quantum Hall regime.
复制标题
分数量子霍尔体系中边缘通道的选择性填充和检测。
DOI：
10.1103/physrevlett.64.685
复制
发表时间：
1990
影响因子：
8.6
通讯作者：
C. Foxon
中科院分区：
文献类型：
--
作者：
L. Kouwenhoven;V. Wees;N. C. Vaart;C. Harmans;C. E. Timmering;C. Foxon
采用可调势垒作为电流和电压探针，研究了二维电子气中分数量子霍尔效应区的输运。我们发现一个分数量子化的霍尔电导整数填充因子的大部分的2DEG，作为分数填充因子的探针的结果。我们认为，这种效应是绝热输运的第一个表现形式的ESTHE。计算结果与Landauer-Buttiker公式一致，该公式中每个分数边通道贡献一个电导伪值2/h。
Transport in the fractional-quantum-Hall-effect (FQHE) regime is studied in a two-dimensional electron gas (2DEG) employing adjustable barriers as current and voltage probes. We find a fractionally quantized Hall conductance for integer filling factor in the bulk of the 2DEG, as a consequence of the fractional filling factor in the probes. We argue that this effect is the first manifestation of adiabatic transport in the FQHE. The results are in agreement with a proposed Landauer-Buttiker formula in which each fractional edge channel contributes a conductance ⅓e2/h.