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Coherent flux tunneling through NbN nanowires

机译:NbN纳米线的相干通量隧穿

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摘要

We demonstrate evidence of coherent magnetic flux tunneling through superconducting nanowires patterned in a thin highly disordered NbN film. The phenomenon is revealed as a superposition of flux states in a fully metallic superconducting loop with the nanowire acting as an effective tunnel barrier for the magnetic flux, and reproducibly observed in different wires. The flux superposition achieved in the fully metallic NbN rings proves the universality of the phenomenon previously reported for InO_x. We perform microwave spectroscopy and study the tunneling amplitude as a function of the wire width, compare the experimental results with theories, and estimate the parameters for existing theoretical models.
机译:我们证明了通过在高度无序的NbN薄膜中形成图案的超导纳米线进行相干磁通隧穿的证据。该现象显示为全金属超导回路中通量状态的叠加,其中纳米线充当磁通量的有效隧道势垒,并且在不同导线中可重复观察到。在全金属NbN环中实现的磁通叠加证明了以前报道的InO_x现象的普遍性。我们进行微波光谱分析,研究随线宽变化的隧穿幅度,将实验结果与理论进行比较,并估计现有理论模型的参数。

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  • 来源
    《Physical review》 |2013年第22期|220506.1-220506.5|共5页
  • 作者单位

    RIKEN Center for Emergent Matter Science, Tsukuba, Ibaraki 305-8501, Japan;

    RIKEN Center for Emergent Matter Science, Tsukuba, Ibaraki 305-8501, Japan,NEC Smart Energy Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan,Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia,Moscow Institute of Physics and Technology, 141700, Dolgoprudny, Moscow Region, Russia,National Research University Higher School of Economics, Moscow 101000, Russia;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia,National Research University Higher School of Economics, Moscow 101000, Russia;

    Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA;

    Department of Physics and IT, Moscow State Pedagogical University, Moscow 119992, Russia,Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands;

    RIKEN Center for Emergent Matter Science, Tsukuba, Ibaraki 305-8501, Japan,NEC Smart Energy Research Laboratories, Tsukuba, Ibaraki 305-8501, Japan;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    mesoscopic and nanoscale systems; cavity quantum electrodynamics; micromasers; josephson junction arrays and wire networks;

    机译:介观和纳米系统;腔量子电动力学微型激光器约瑟夫森结阵列和有线网络;

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