论文标题
方形原子晶格上的纳米级天空
Nanoscale Skyrmions on a Square Atomic Lattice
论文作者
论文摘要
自旋偏振扫描隧道显微镜已应用于在四倍的对称W（001）底物上研究Mn单层的非共线自旋纹理，揭示了零场旋转螺旋态和两种不同类型的旋转结构壁。在施加的磁场为9 t的情况下，我们观察到自旋螺旋和天空矩阵的共存，尽管先前的理论研究报告说，尽管W（001）substrate的平方晶格对称性，但Skyrmions在18 t处发生了相位过渡。基于减少的能量参数集，我们能够描述实验发现并分析旋转域壁的拓扑特性。
Spin-polarized scanning tunneling microscopy has been applied to study non-collinear spin textures of a Mn monolayer on a four-fold symmetric W(001) substrate revealing a zero-field spin spiral ground state and two different types of rotational domain walls. With an applied magnetic field of 9 T, we observe a coexistence of the spin spiral and the skyrmion phase, even though a previous theoretical study reported that the phase transition occurs at 18 T. The skyrmions show a roughly hexagonal arrangement despite the square lattice symmetry of the W(001) substrate. Based on a reduced set of energy parameters, we are able to describe the experimental findings and to analyze the topological properties of the rotational domain walls.
