论文标题
磁性涡流液体和异常的热厅电导率在沮丧的磁铁中具有键相互作用
Magnetic vortex liquid and anomalous thermal Hall conductivity in frustrated magnets with bond-dependent interactions
论文作者
论文摘要
最近，在没有明显的对称性的相关绝缘子中观察到大厅的大厅电导率引起了巨大的兴趣，并在基础基础状态下进行了争论。在这里，考虑到具有键依赖性相互作用的沮丧磁铁，这些相互作用是在所谓的基塔耶（Kitaev）材料中实现的，我们从理论上证明，大型热霍尔电导率可以源自经典的基态，而无需任何磁性。我们发现了一种新型的磁性液态液态，在平面外磁场下，它是嵌入极化自旋背景中的不均匀的自旋纹理。在经典制度中，涡流的不同配置形成了退化的歧管。我们研究了零和有限温度下的磁涡流液态液态的静态和动力学特性。特别是，我们表明自旋激发光谱类似于几乎平坦的Chern带的连续体，这最终导致了较大的热厅电导率。讨论了与实验的可能联系。
Recently, the observation of large thermal Hall conductivities in correlated insulators with no apparent broken symmetry have generated immense interest and debates on the underlying ground states. Here, considering frustrated magnets with bond-dependent interactions, which are realized in the so-called Kitaev materials, we theoretically demonstrate that a large thermal Hall conductivity can originate from a classical ground state without any magnetic order. We discover a novel liquid state of magnetic vortices, which are inhomogeneous spin textures embedded in the background of polarized spins, under out-of-plane magnetic fields. In the classical regime, different configurations of vortices form a degenerate manifold. We study the static and dynamical properties of the magnetic vortex liquid state at zero and finite temperatures. In particular, we show that the spin excitation spectrum resembles a continuum of nearly flat Chern bands, which ultimately leads to a large thermal Hall conductivity. Possible connections to experiments are discussed.
