论文标题
巨大谷极化的自旋分裂中磁化的Janus Pt Dialcogenides
Giant Valley-Polarized Spin Splittings in Magnetized Janus Pt Dichalcogenides
论文作者
论文摘要
我们揭示了与氧化欧洲裔（EUO）底物结合时，揭示了Janus Pt Dialcogenides（例如SPTSE）的巨大接近磁性磁性和山谷极化作用。使用第一原理模拟，令人惊讶的是，由于与EUO的距离近距离，电荷再分配导致导致两个K和K $^{'} $ valleys在传导带中形成。这些山谷中的每一个都显示出自己的自旋极化以及特定的自旋纹理，由破裂的反转和时间反转对称性决定，山谷 - 交换和Rashba分裂量大至数百个MEV。这为探索低维半导体中新型的自旋valley物理学提供了一个平台，并具有潜在的自旋传输机制，例如自旋轨道扭矩，对疾病和温度效应的弹性更具弹性。
We reveal giant proximity-induced magnetism and valley-polarization effects in Janus Pt dichalcogenides (such as SPtSe), when bound to the Europium oxide (EuO) substrate. Using first-principles simulations, it is surprisingly found that the charge redistribution, resulting from proximity with EuO, leads to the formation of two K and K$^{'}$valleys in the conduction bands. Each of these valleys displays its own spin polarization and a specific spin-texture dictated by broken inversion and time-reversal symmetries, and valley-exchange and Rashba splittings as large as hundreds of meV. This provides a platform for exploring novel spin-valley physics in low-dimensional semiconductors, with potential spin transport mechanisms such as spin-orbit torques much more resilient to disorder and temperature effects.
