论文标题
部分可观测时空混沌系统的无模型预测
RKKY interaction at helical edges of topological superconductors
论文作者
论文摘要
我们在分析和数值上研究了靠近二维拓扑超导体边缘的经典磁杂质的自旋构型。首先，我们证明，靠近拓扑超导体边缘的单个磁杂质的自旋倾向于沿边缘对齐。这种效果背后的强轴旋转各向异性源于杂质与无间隙螺旋巨大边缘状态之间的相互作用。然后，我们计算了靠近边缘的两个磁杂质之间的Ruderman-Kittel-Kasuya-Yosida（rkky）相互作用。我们表明，在较大的爆发性距离的极限下，两种杂质之间的rkky相互作用主要是由Majorana边缘状态介导的，并导致两个旋转沿边缘的铁磁对齐。这种效果可用于检测螺旋主要的边缘状态。
We study spin configurations of classical magnetic impurities placed close to the edge of a two-dimensional topological superconductor both analytically and numerically. First, we demonstrate that the spin of a single magnetic impurity close to the edge of a topological superconductor tends to align along the edge. The strong easy-axis spin anisotropy behind this effect originates from the interaction between the impurity and the gapless helical Majorana edge states. We then compute the Ruderman-Kittel-Kasuya-Yosida (RKKY) interaction between two magnetic impurities placed close to the edge. We show that, in the limit of large interimpurity distances, the RKKY interaction between the two impurities is mainly mediated by the Majorana edge states and leads to a ferromagnetic alignment of both spins along the edge. This effect could be used to detect helical Majorana edge states.
