Edge-channel interference controlled by Landau level filling
Edge-channel interference controlled by Landau level filling
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DOI：
10.1103/physrevb.78.075303
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发表时间：
2008-08-01
影响因子：
3.7
通讯作者：
Strunk, C.
中科院分区：
文献类型：
--
作者：
Litvin, L. V.;Helzel, A.;Strunk, C.
我们研究在整数量子霍尔区域中电子马赫 - 曾德尔干涉仪里阿哈罗诺夫 - 玻姆干涉的可见度。可见度由填充因子ν控制，并且仅在ν约为2.0和1.0之间被观测到，在ν = 1.5附近有一个意外的最大值。从可见度的温度和电压依赖性中提取出的三个能量尺度随填充因子以非常相似的方式变化，这表明干涉的不同方面敏感地依赖于形成量子霍尔边缘通道的可压缩和不可压缩条带的局部结构。
We study the visibility of Aharonov-Bohm interference in an electronic Mach-Zehnder interferometer in the integer quantum Hall regime. The visibility is controlled by the filling factor v and is observed only between nu approximate to 2.0 and 1.0, with an unexpected maximum near nu=1.5. Three energy scales extracted from the temperature and voltage dependences of the visibility change in a very similar way with the filling factor, indicating that the different aspects of the interference depend sensitively on the local structure of the compressible and incompressible strips forming the quantum Hall edge channels.