Effects of impurity scattering on the quantized conductance of a quasi-one-dimensional quantum wire
Effects of impurity scattering on the quantized conductance of a quasi-one-dimensional quantum wire
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DOI：
10.1063/1.3067995
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发表时间：
2009-01-05
影响因子：
4
通讯作者：
Komiyama, S.
中科院分区：
文献类型：
--
作者：
Chen, J. C.;Lin, Yiping;Komiyama, S.
我们报告的准一维导线中的杂质的存在如何影响量子化电导的实验观察。杂质是一个化学蚀刻的纳米孔，相对于它，导线的壁可以通过外部栅极电压进行调整。根据不同的侧壁的位置，观察到的共振特性的量子化电导由于杂质和线壁之间的多次散射或沟道干扰。同时，微分电导在单沟道导线中表现出半平台特性，在双沟道耦合导线中表现出饱和特性。
We report an experimental observation of how the presence of an impurity in a quasi-one-dimensional wire influences the quantized conductance. The impurity is a chemically etched nanohole, relative to which the walls of the wire can be tuned via external gate voltages. Depending on the positions of the sidewalls, resonance features are observed in the quantized conductance due to either the multiple scatterings between the impurity and the wall of wire or the channel interference. Meanwhile, the differential conductance exhibits the well-known half-plateau features in a single channel wire or saturates in a wire with coupled two channels.