论文标题
在石墨烯介质台球中接近诱导的自旋轨道耦合的影响
Effect of proximity-induced spin-orbit coupling in graphene mesoscopic billiards
论文作者
论文摘要
基于二维材料的范德华异质结构最近已成为Spintronics研究的一个非常活跃的主题，均针对纳米结构中的自旋倾向过程的基本描述，也是基于自旋信息处理方案的潜在元素。在这里，我们从理论上研究了从石墨烯接近耦合到高自旋轨道耦合材料的介质设备的磁性。通过数值确切的紧密结合模拟，我们表明，即使$ z \ rightarrow -z $ rightarrow -z $对称的旋转轨道耦合在量子点中占主导地位的bychkkov-rashba相互作用，倒置对称的界面断裂也会产生可靠的弱反向定位。我们的发现是根据随机矩阵理论解释的，该理论将量子干扰校正的观察到的行为与从圆形 - 正交到圆形弹性合奏的过渡联系起来。
Van der Waals heterostructures based on two-dimensional materials have recently become a very active topic of research in spintronics, both aiming at a fundamental description of spin dephasing processes in nanostructures and as a potential element in spin-based information processing schemes. Here, we theoretically investigate the magnetoconductance of mesoscopic devices built from graphene proximity-coupled to a high spin-orbit coupling material. Through numerically exact tight-binding simulations, we show that the interfacial breaking of inversion symmetry generates robust weak antilocalization even when the $z\rightarrow -z$ symmetric spin-orbit coupling in the quantum dot dominates over the Bychkov--Rashba interaction. Our findings are in interpreted on the light of random matrix theory, which links the observed behavior of quantum interference corrections to a transition from circular-orthogonal to circular-sympletic ensemble.
