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Electrical switching of the edge channel transport in HgTe quantum wells with an inverted band structure

机译:具有倒带结构的HgTe量子阱中边缘通道传输的电开关

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摘要

We demonstrate theoretically an electrical switching of the edge-state transport by means of a quantum point contact in HgTe quantum wells with an inverted band structure. The switch-on/off of the edge channel is caused by the finite size effect of the quantum point contact and therefore can be manipulated by tuning the voltage applied on the split gate. This electrical switching behavior offers us an efficient way to control the topological edge state transport which is robust against the local perturbation.
机译:我们在理论上通过具有反向能带结构的HgTe量子阱中的量子点接触,证明了边缘态传输的电开关。边缘通道的导通/关断是由量子点触点的有限尺寸效应引起的,因此可以通过调节施加在分离栅上的电压来控制。这种电气开关行为为我们提供了一种控制拓扑边缘状态传输的有效方法,该方法可抵抗局部干扰。

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  • 来源
    《Physical review》 |2011年第8期|p.081402.1-081402.4|共4页
  • 作者单位

    SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China;

    SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China,Department of Physics and Electronic Science, Changsha University of Science and Technology, Changsha 410004, China;

    Center for Statistical and Theoretical Condensed MatterPhysics and Department of Physics, Zhejiang Normal University, Jinhua 321004,People's Republic of China;

    SKLSM, Institute of Semiconductors, Chinese Academy of Sciences, P.O. Box 912, Beijing 100083, China,Beijing Computational Science Research Center, Beijing 100089, China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    fullerenes and related materials; photonic bandgap materials; reflectors; beam splitters; and deflectors;

    机译:富勒烯及相关材料;光子带隙材料;反射器;分束器;和导流板;

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