论文标题
温度诱导的宏伟的Chern绝缘子共线抗铁磁铁
Temperature-Induced Magnonic Chern Insulator in Collinear Antiferromagnets
论文作者
论文摘要
磁体中的热波动会给镁带来温度依赖的自能校正，但是，它们对镁拓扑顺序的影响尚未得到很好的探索。在这里，我们证明了这种校正可以通过升高温度诱导二维截面抗铁磁体中的Chern绝缘阶段。我们介绍了系统的相图，并表明在零温度下的小镁带在顺磁相跃迁之前的临界温度高于临界温度上方。自我能力校正在γ或k点上关闭并重新打开带隙，并伴随着镁手性开关和非平凡的浆果曲率过渡。镁的热厅效应或检测镁偏振可以给出拓扑转换的实验突出特征。我们包括基于范德华磁铁MNPS3的数值结果，要求实现实验。我们的工作提出了一个新的范式，用于构建拓扑阶段，这超出了线性自旋波理论。
Thermal fluctuation in magnets will bring temperature-dependent self-energy corrections to the magnons, however, their effects on the topological orders of magnons is not well explored. Here we demonstrate that such corrections can induce a Chern insulating phase in two-dimensional collinear antiferromagnets with sublattice asymmetries by increasing temperature. We present the phase diagram of the system and show that the trivial magnon bands at zero temperature exhibit Chern insulating phase above a critical temperature before the paramagnetic phase transition. The self-energy corrections close and reopen the bandgap at Γ or K points, accompanied by a magnon chirality switch and nontrivial Berry curvature transition. The thermal Hall effect of magnons or detecting the magnon polarization can give experimentally prominent signatures of topological transitions. We include the numerical results based on van der Waals magnet MnPS3, calling for experimental implementation. Our work presents a new paradigm for constructing topological phase that is beyond the linear spin wave theory.
