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首页> 外文期刊>Physical review >Controlling electron propagation on a topological insulator surface via proximity interactions
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Controlling electron propagation on a topological insulator surface via proximity interactions

机译：通过邻近相互作用控制电子在拓扑绝缘体表面上的传播

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摘要

The possibility of electron beam guiding is theoretically explored on the surface of a topological insulator through the proximity interaction with a magnetic material. The electronic band modification induced by the exchange coupling at the interface defines the path of electron propagation in analogy to the optical fiber for photons. Numerical simulations indicate the guiding efficiency is much higher than that in the "waveguide" formed by an electrostatic potential barrier such as p-n junctions. Furthermore, the results illustrate effective flux control and beam steering that can be realized by altering the magnetization/spin texture of the adjacent magnetic materials. Specifically, the feasibility to switch on and off and make a large-angle turn is demonstrated under realistic conditions. Potential implementation to logic and interconnect applications is also examined in connection with electrically controlled magnetization switching.
机译：理论上，通过与磁性材料的邻近相互作用，可以在拓扑绝缘体的表面上探索电子束引导的可能性。由界面处的交换耦合引起的电子能带改变，类似于光子的光纤，定义了电子传播的路径。数值模拟表明，引导效率远高于由静电势垒（例如p-n结）形成的“波导”。此外，结果表明可以通过改变相邻磁性材料的磁化/自旋织构来实现有效的磁通控制和光束转向。具体而言，在现实条件下证明了打开和关闭以及进行大角度转弯的可行性。结合电控磁化开关，还研究了逻辑和互连应用的潜在实现方式。

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