arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1107.0585cond-mat.mes-hallcond-mat.mtrl-sci
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量子自旋Hall边态的自旋极化

Spin polarization of the quantum spin Hall edge states

Christoph Brüne, Andreas Roth, Hartmut Buhmann, Ewelina M. Hankiewicz, Laurens W. Molenkamp, Joseph Maciejko, Xiao-Liang Qi, Shou-Cheng Zhang

摘要:

虽然负责在量子自旋霍尔制度的二维拓扑绝缘体的电荷传输的边缘通道的螺旋字符是现在已经很好地建立,在边缘通道的传输是自旋极化的实验确认仍然是突出的。我们报告的实验从碲化汞量子阱与倒置的能带结构,其中分裂门技术,使我们能够结合量子自旋霍尔和金属自旋霍尔运输在一个单一的设备上的纳米结构。在这些器件中,量子自旋霍尔效应可以用作金属自旋霍尔效应的自旋电流注入器和检测器,反之亦然,允许自旋极化的全电检测。

英文摘要:

While the helical character of the edge channels responsible for charge transport in the quantum spin Hall regime of a two-dimensional topological insulator is by now well established, an experimental confirmation that the transport in the edge channels is spin-polarized is still outstanding. We report experiments on nanostructures fabricated from HgTe quantum wells with an inverted band structure, in which a split gate technique allows us to combine both quantum spin Hall and metallic spin Hall transport in a single device. In these devices, the quantum spin Hall effect can be used as a spin current injector and detector for the metallic spin Hall effect, and vice versa, allowing for an all-electrical detection of spin polarization.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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