The electronic transport dimension plays a key role on the topological quantum devices. For example, the 3D conductive system should be reduced into a 2D electronic system for the observation of quantum Hall effect with 1D edge transport. Here, we report an anomalous dimensional reduction of transport carriers by increasing the geometry size of Dirac semimetal Cd3As2-based Josephson junctions. An evolution of the supercurrent quantum interferences from a standard Fraunhofer pattern to a SQUID (Superconducting Quantum Interference Device)-like one is observed when increasing the channel length of the junction. Distinguished transport from 3D bulk states to 1D edge states are realized in samples with different size. The results should be valuable for modulation of the supercurrent transport path and thus have promising potential for quantum interference devices.

中文翻译：

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通过增加Dirac半金属约瑟夫逊结的几何尺寸，将电子传输尺寸减小到拓扑铰链状态

电子传输维度在拓扑量子设备上起着关键作用。例如，应将3D导电系统简化为2D电子系统，以观察具有1D边缘传输的量子霍尔效应。在这里，我们报告通过增加基于Dirac半金属Cd3As2的约瑟夫逊结的几何尺寸，使运输载体尺寸反常减少。当增加结的沟道长度时，观察到超电流量子干扰从标准的弗劳恩霍夫（Fraunhofer）模式演变成SQUID（超导量子干涉设备）状。从3D体态到1D边缘态的出色传输是在具有不同大小的样本中实现的。