AI 中文总结
该研究基于弗洛凯理论，提出通过高频圆偏振光照射调控拓扑表面态的电流诱导自旋极化，可改变其动量空间自旋织构甚至反转电自旋极化率，为自旋电子学调控提供新途径。
AI 中文摘要
拓扑表面态因具有自旋-动量锁定特性，成为自旋电子学的极具前景的平台。自旋-动量锁定可通过电流在拓扑表面态中诱导净自旋极化，该现象被称为埃德尔斯坦效应（Edelstein effect）。本研究利用弗洛凯理论（Floquet theory）表明，可通过用光照射拓扑表面态来调控其电流诱导自旋极化，进而改变其动量空间中的自旋织构。具体而言，通过改变高频圆偏振光的电场强度，可调控甚至反转拓扑表面态的电自旋极化率。
英文摘要
Topological surface states are a promising platform for spintronics due to spin-momentum locking. Spin-momentum locking can induce a net spin polarization in topological surface states via an electric current, a phenomenon known as the Edelstein effect. In this work, using Floquet theory, we show that the current-induced spin polarization of topological surface states can be tuned by illuminating them with light, thereby modifying their spin texture in momentum space. Specifically, the electric spin susceptibility of topological surface states can be controlled and even reversed by varying the electric-field strength of high-frequency, circularly polarized light.
Comments8 pages, 4 figures
