论文标题
使用氦离子辐射，在氮化氮化物上的超导纳米线制造
Superconducting Nanowire Fabrication on Niobium Nitride using Helium Ion Irradiation
论文作者
论文摘要
超导设备容易降低由电线边缘杂质和缺陷引起的性能，这可能导致当前当前的拥挤。在这项研究中，我们探讨了使用氦离子辐射来修饰超导材料的晶格结构以改变其内在特性。该过程将使我们能够直接对设备进行调整并有可能提高纳米线的质量。为了实现这一目标，我们使用了扫描氦离子显微镜（HIM）的离子光束将超导材料的损伤定位以产生纳米线。在这项研究中进行了两个实验。首先，将一系列氦离子剂量暴露在硝酸氮化物（NBN）微无菌上，以确定抑制超导性的估计剂量密度。使用第一个实验的结果，将纳米线图案化在微线上，并测量每个样品的电流 - 电压特性。我们的结果表明，氦离子辐照是用于超导纳米线的有效无抵抗制造方法。
Superconducting devices are prone to reduced performance caused by impurities and defects along the edges of their wires, which can lead to local current crowding. In this study, we explored the use of helium ion irradiation to modify the lattice structure of the superconducting material to change its intrinsic properties. The process will allow us to directly pattern devices and potentially improve the quality of the nanowires. To achieve this, we used the ion beam from a scanning helium ion microscope (HIM) to localize damage on a superconducting material to create a nanowire. Two experiments were performed in this study. First, a range of helium ion doses was exposed on a niobium nitride (NbN) microwire to determine the estimated dose density to suppress superconductivity. Using the results of this first experiment, nanowires were patterned onto a microwire, and the current-voltage characteristics were measured for each sample. Our results showed that helium ion irradiation is an effective resistless fabrication method for superconducting nanowires.
