论文标题
预测巨型和理想的rashba型分裂，以在极地生长的合金单层有序
Prediction of giant and ideal Rashba-type splitting in ordered alloy monolayers grown on a polar surface
论文作者
论文摘要
对于材料在自旋装置中的应用以及在固体中的主要含量中，需要对材料的应用进行大型，理想的Rashba型自旋轨道分裂。在这里，我们提出了一种通过有序的表面合金和界面工程的组合，即在绝缘极性表面上生长合金单层。我们通过在Al $ _2 $ o $ _3 $（0001）上支持的SBBI和PBBI的弯曲六角形单层的第一原理计算来说明这种独特的策略。这两个系统都显示出理想的Rashba型状态，具有巨大的分裂状态，其特征在于能量偏移超过600 MeV和超过0.3 $Å^{ - 1} $的动量偏移。因此，我们的研究指出了在低维材料中调整自旋轨道分裂的有效方法，以引起即时的实验兴趣。
A large and ideal Rashba-type spin-orbit splitting is desired for the applications of materials in spintronic devices and the detection of Majorana Fermions in solids. Here, we propose an approach to achieve giant and ideal spin-orbit splittings through a combination of ordered surface alloying and interface engineering, that is, growing alloy monolayers on an insulating polar surface. We illustrate this unique strategy by means of first-principles calculations of buckled hexagonal monolayers of SbBi and PbBi supported on Al$_2$O$_3$(0001). Both systems display ideal Rashba-type states with giant SO splittings, characterized with energy offsets over 600 meV and momentum offsets over 0.3 $Å^{-1}$, respectively. Our study thus points to an effective way of tuning spin-orbit splitting in low-dimensional materials to draw immediate experimental interest.
