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Tuning Yu-Shiba-Rusinov states in a quantum dot

机译:在量子点中调整Yu-Shiba-Rusinov状态

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摘要

We present transport spectroscopy of subgap states in a bottom gated InAs nanowire coupled to a normal lead and a superconducting aluminium lead. The device shows clearly resolved subgap states which we can track as the coupling parameters of the system are tuned and as the gap is closed by means of a magnetic field. We systematically extract system parameters by using numerical renormalization-group theory fits as a level of the quantum dot is tuned through a quantum phase transition electrostatically and magnetically. We also give an intuitive description of subgap excitations.
机译:我们目前在耦合到正常铅和超导铝铅的底栅InAs纳米线中的亚能隙态的传输光谱学。该设备显示出清晰分辨的子间隙状态,随着系统耦合参数的调整以及间隙通过磁场的闭合,我们可以跟踪这些状态。我们使用数值重归一化组理论拟合系统地提取系统参数,因为量子点的水平通过静电和磁性的量子相变来调节。我们还给出了子带隙激励的直观描述。

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  • 来源
    《Physical review》 |2016年第6期|064520.1-064520.8|共8页
  • 作者单位

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark;

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark;

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark;

    Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen, Denmark;

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