论文标题
外延拓扑绝缘子/石墨烯/甘油异质结构的接近诱导的超导性
Proximity-Induced Superconductivity in Epitaxial Topological Insulator/Graphene/Gallium Heterostructures
论文作者
论文摘要
拓扑绝缘子的狄拉克表面状态的超导引入导致拓扑超导体，这可能支持通过Majorana零模式进行拓扑量子计算。可扩展材料平台的开发是实现拓扑量子计算的关键。在这里，我们报告了高质量（BI，SB）2TE3/Chaphene/Gallium异质结构的生长和特性。我们的合成方法在两个异质界面上都可以原子尖锐的层，这反过来促进了起源于胆汁膜的接近性诱导的超导性。开发了无光刻的范德华隧道连接，以执行传输隧道光谱。我们发现在5-10个五重杆层（BI，SB）2TE3/Chapeene/Gallium异质结构中，在Dirac表面状态中形成的坚固，接近诱导的超导间隙。有望居住的单个Abrikosov涡流的存在表现为离散电导的变化。当前的材料平台为理解和利用拓扑超导性的应用潜力提供了机会。
The introduction of superconductivity to the Dirac surface states of a topological insulator leads to a topological superconductor, which may support topological quantum computing through Majorana zero modes. The development of a scalable material platform is key to the realization of topological quantum computing. Here we report on the growth and properties of high-quality (Bi,Sb)2Te3/graphene/gallium heterostructures. Our synthetic approach enables atomically sharp layers at both hetero-interfaces, which in turn promotes proximity-induced superconductivity that originates in the gallium film. A lithography-free, van der Waals tunnel junction is developed to perform transport tunneling spectroscopy. We find a robust, proximity-induced superconducting gap formed in the Dirac surface states in 5-10 quintuple-layer (Bi,Sb)2Te3/graphene/gallium heterostructures. The presence of a single Abrikosov vortex, where the Majorana zero modes are expected to reside, manifests in discrete conductance changes. The present material platform opens up opportunities for understanding and harnessing the application potential of topological superconductivity.
