论文标题
SRTIO $ _3 $基于$ _3 $的量子点联系人中量化关键超级流
Quantized critical supercurrent in SrTiO$_3$-based quantum point contacts
论文作者
论文摘要
Srtio $ _3 $中的超导性发生在非常低的载体密度下，因此，与常规的超导体不同，可以通过静电门控制。在这里，我们演示了连接超导导线的纳米级弱链接，它们都在单个材料中，Srtio $ _3 $。离子液体门控会积聚导线中的载体，并调整局部静电门以打开弱环节。这些设备的表现是与量化的临界超电流的超导量子点接触。这是建立Srtio $ _3 $作为介观超导运输实验的单物质平台的里程碑，它也内在地包含必要的成分，以设计拓扑超导性。
Superconductivity in SrTiO$_3$ occurs at remarkably low carrier densities and therefore, unlike conventional superconductors, can be controlled by electrostatic gates. Here we demonstrate nanoscale weak links connecting superconducting leads, all within a single material, SrTiO$_3$. Ionic liquid gating accumulates carriers in the leads, and local electrostatic gates are tuned to open the weak link. These devices behave as superconducting quantum point contacts with a quantized critical supercurrent. This is a milestone towards establishing SrTiO$_3$ as a single-material platform for mesoscopic superconducting transport experiments, that also intrinsically contains the necessary ingredients to engineer topological superconductivity
