论文标题
硅的光藻素效应
Photogalvanic Effect in Silicene
论文作者
论文摘要
硅已经作为一种杰出的新颖材料介绍了自己，该材料在Cu和Ag等常见的Spintronic设备中寻求优点。在这项工作中，在半古典方法和以外的迪拉克点近似中研究了硅烯中的光藻素效应。正常的电场起着有效伪磁场的作用，它打破了反转对称性并拆分传导和价带。该外场与固有的自旋轨道耦合之间的相互作用提供了硅胶中的自旋谷化锁定。在硅中锁定的旋转 - 瓦利锁定使该材料优于其碳对烯石墨烯。由于在两个山谷中的极化光子的吸收都不等效，因此自旋 - 瓦利锁定会导致自旋极化光电流注入。
Silicene has introduced itself as an outstanding novel material, which seeks its meritorious place among common spintronic devices like Cu and Ag. In this work, photogalvanic effect in silicene is studied within the semi-classical approach and beyond Dirac point approximation. Normal electric field plays the role of effective pseudo-magnetic field which breaks the inversion symmetry and splits the conduction and valence bands. The interplay between this external field and intrinsic spin-orbit coupling provides spin-valley locking in silicene. Spin-valley locking in silicene makes this material superior to its carbon counterpart, graphene. Since the absorption of the polarized photons is not equivalent at both of the valleys, spin-valley locking leads to a spin-polarized photocurrent injection.
