Multiprobe quantum spin Hall bars

被引：0
|
作者：
Awadhesh Narayan
Stefano Sanvito
机构：
[1] School of Physics,
[2] AMBER and CRANN,undefined
[3] Trinity College,undefined
来源：
The European Physical Journal B | 2014年 / 87卷
关键词：
Solid State and Materials;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We analyze electron transport in multiprobe quantum spin Hall (QSH) bars using the Büttiker formalism and draw parallels with their quantum Hall (QH) counterparts. We find that in a QSH bar the measured resistance changes upon introducing side voltage probes, in contrast to the QH case. We also study four- and six-terminal geometries and derive the expressions for the resistances. For these our analysis is generalized from the single-channel to the multi-channel case and to the inclusion of backscattering originating from a constriction placed within the bar.
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