论文标题
二维双层量子磁铁中对木拓拓扑和谷地极化的见解
Insights on magnon topology and valley-polarization in 2D bilayer quantum magnets
论文作者
论文摘要
分层2D磁铁中的丰富和非常规物理学可以为拓扑镁和镁谷陶龙开放新的途径。特别是，由于其引人入胜的堆叠依赖性磁性，可控制的接地态和由磁性自旋轨道耦合（SOCS）引起的拓扑激发，二维（2D）双层量子磁铁正在越来越受到关注。尽管对这些材料进行了大量研究，但迄今为止，它们的拓扑特征仍未得到广泛探索。本研究全面研究了具有共线磁性的蜂窝双层中的镁拓扑和镁谷极化。我们阐明了SOC，磁场，堆叠顺序的单独和组合效应，以及对拓扑阶段，镁谷的运输以及大厅和Nernst效应的倒置对称性破裂。全面的分析提出了确定SOC性质的线索，并预测拓扑琐事阶段中非常规的大厅和Nernst电导率。我们进一步报告了分层的抗铁磁体中新型的带隙封闭，并详细介绍了它们的拓扑含义。我们认为，本研究为拓扑2D元音的基本物理和技术潜力提供了重要的见解。
The rich and unconventional physics in layered 2D magnets can open new avenues for topological magnonics and magnon valleytronics. In particular, two-dimensional (2D) bilayer quantum magnets are gaining increasing attention due to their intriguing stacking-dependent magnetism, controllable ground states, and topological excitations induced by magnetic spin-orbit couplings (SOCs). Despite the substantial research on these materials, their topological features remain widely unexplored to date. The present study comprehensively investigates the magnon topology and magnon valley-polarization in honeycomb bilayers with collinear magnetic order. We elucidate the separate and combined effects of the SOC, magnetic ground-states, stacking order, and inversion symmetry breaking on the topological phases, magnon valley transport, and the Hall and Nernst effects. The comprehensive analysis suggests clues to determine the SOC's nature and predicts unconventional Hall and Nernst conductivities in topologically trivial phases. We further report on novel bandgap closures in layered antiferromagnets and detail their topological implications. We believe the present study provides important insights into the fundamental physics and technological potentials of topological 2D magnons.
