论文标题
三端INSB-AL纳米线设备中零能量模式的参数探索
Parametric exploration of zero-energy modes in three-terminal InSb-Al nanowire devices
论文作者
论文摘要
我们通过使用射频反射仪系统地研究了三端INSB-AL纳米线设备。在系统地改变化学电位，磁场和连接透明胶片的同时，进行了混合纳米线两端的隧道光谱测量。识别最低能量状态可以构建最低和零能量状态图，这些状态显示了状态如何随上述参数的函数而演变。重要的是，比较杂种每一端所拍摄的图表可以识别不同时存在的状态，从而排除了大量的参数空间为拓扑阶段的候选者。此外，改变连接透明胶片会过滤掉对局部门电位敏感的零能状态。这种测量策略大大减少了确定潜在拓扑阶段所需的时间，并最大程度地减少了错误地识别琐碎结合状态为主要零模式的风险。
We systematically study three-terminal InSb-Al nanowire devices by using radio-frequency reflectometry. Tunneling spectroscopy measurements on both ends of the hybrid nanowires are performed while systematically varying the chemical potential, magnetic field and junction transparencies. Identifying the lowest-energy state allows for the construction of lowest- and zero-energy state diagrams, which show how the states evolve as a function of the aforementioned parameters. Importantly, comparing the diagrams taken for each end of the hybrids enables the identification of states which do not coexist simultaneously, ruling out a significant amount of the parameter space as candidates for a topological phase. Furthermore, altering junction transparencies filters out zero-energy states sensitive to a local gate potential. Such a measurement strategy significantly reduces the time necessary to identify a potential topological phase and minimizes the risk of falsely recognizing trivial bound states as Majorana zero modes.
