论文标题
打开拓扑绝缘体中的表面传导
Switching on surface conduction in a topological insulator
论文作者
论文摘要
拓扑绝缘子的受保护的表面传导对下一代电子设备的需求很高。前进所需的是可靠的设置，在该设置中，拓扑表面电流可以通过简单的手段来控制，理想情况下是通过外部刺激的应用。令人惊讶的是，这个方向几乎没有探索。在这项工作中，我们证明我们可以通过光和电场来增强拓扑绝缘子的表面传导。这以完全控制的方式发生，额外的迪拉克携带者表现出超长的寿命。我们提供了一种全面的理解，即载体是从固有的schottky屏障中从散装到地面状态注入的。我们希望这种机制在各种材料和实验环境中发挥作用。
The protected surface conduction of topological insulators is in high demand for the next generation of electronic devices. What is needed to move forward are robust settings where topological surface currents can be controlled by simple means, ideally by the application of external stimuli. Surprisingly, this direction is only little explored. In this work we demonstrate that we can boost the surface conduction of a topological insulator by both light and electric field. This happens in a fully controlled way, and the additional Dirac carriers exhibit ultra-long lifetimes. We provide a comprehensive understanding, namely that carriers are injected from the bulk to the surface states across an intrinsic Schottky barrier. We expect this mechanism to be at play in a broad range of materials and experimental settings.
