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Topological quantum pump in serpentine-shaped semiconducting narrow channels

机译：蛇形半导体窄通道中的拓扑量子泵

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摘要

We propose and analyze theoretically a one-dimensional solid-state electronic setup that operates as a topological charge pump in the complete absence of superimposed oscillating local voltages. The system consists of a semiconducting narrow channel with a strong Rashba spin-orbit interaction patterned in a mesoscale serpentine shape. A rotating planar magnetic held serves as the external ac perturbation, and cooperates with the Rashba spin-orbit interaction, which is modulated by the geometric curvature of the electronic channel to realize the topological pumping protocol, originally introduced by Thouless, in a different fashion. We expect the precise pumping of electric charges in our mesoscopic quantum device to be relevant for quantum metrology purposes.
机译：我们提出并从理论上分析一维固态电子装置，该装置在完全不存在叠加的振荡局部电压的情况下可以用作拓扑电荷泵。该系统由具有中拉蛇形形状的强Rashba自旋轨道相互作用的半导体窄通道组成。旋转的平面磁保持器用作外部扰动，并与Rashba自旋轨道相互作用配合，后者由电子通道的几何曲率调制，以实现Thouless最初以不同方式引入的拓扑抽运协议。我们期望介观量子设备中电荷的精确泵送与量子计量目的相关。

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  • 来源
    《Physical review》 |2018年第24期|241103.1-241103.5|共5页
  • 作者

    Sudhakar Pandey; Niccolo Scopigno; Paula Gentile; Mario Cuoco; Carmine Ortix;

  • 作者单位

    Institute for Theoretical Solid State Physics, IFW-Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany;

    Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, NL-3584 CC Utrecht, Netherlands;

    CNR-SPIN, I-84084 Eisciano (Salerno), Italy,Dipartimento di Fisica "E. R. Caianiello," Universita di Salerno, I-84084 Fisciano (Salerno), Italy;

    CNR-SPIN, I-84084 Eisciano (Salerno), Italy,Dipartimento di Fisica "E. R. Caianiello," Universita di Salerno, I-84084 Fisciano (Salerno), Italy;

    Institute for Theoretical Physics, Center for Extreme Matter and Emergent Phenomena, Utrecht University, Princetonplein 5, NL-3584 CC Utrecht, Netherlands,Dipartimento di Fisica "E. R. Caianiello," Universita di Salerno, I-84084 Fisciano (Salerno), Italy, Institute for Theoretical Solid State Physics, IFW-Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany;

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