论文标题
二维铁磁体的通用旋转状态的指纹跳跃
Fingerprints of Universal Spin-Stiffness Jump in Two-Dimensional Ferromagnets
论文作者
论文摘要
通过在合成二维磁性范德华系统中的最新进展的推动下，我们提出了一种用于检测拓扑结构实验中拓扑的berezinskii-kosterlitz-thouless（bkt）相位过渡的设置。我们证明，可以使用注射旋转电流到一对金属铅中的空间相关性可用于测量铁磁性旋转态度中预测的$ 2/π$的预测通用跳跃及其预测的通用平方根依赖性，因为从下面接近过渡。我们的设置提供了一条简单的途径，可以在二维磁系统中测量这种拓扑相变，这是现在已经证明难以捉摸的。希望这将鼓励实验努力，以研究低维磁系统中没有局部顺序参数的低维磁系统中标准的金兹堡 - 兰道范式之外的关键现象。
Motivated by recent progress on synthesizing two-dimensional magnetic van der Waals systems, we propose a setup for detecting the topological Berezinskii-Kosterlitz-Thouless (BKT) phase transition in spin-transport experiments on such structures. We demonstrate that the spatial correlations of injected spin-currents into a pair of metallic leads can be used to measure the predicted universal jump of $2/π$ in the ferromagnet spin-stiffness as well as its predicted universal square root dependence on temperature as the transition is approached from below. Our setup provides a simple route to measuring this topological phase transition in two-dimensional magnetic systems, something which up to now has proven elusive. It is hoped that this will encourage experimental efforts to investigate critical phenomena beyond the standard Ginzburg-Landau paradigm in low-dimensional magnetic systems with no local order parameter.
