标题： 镱锰铋2中的超高反常能斯特热电势和热霍尔角 显示英文标题

标题： Ultrahigh Anomalous Nernst Thermopower and Thermal Hall Angle in YbMnBi2

摘要： 热电材料（TEs）是能够实现热电转换的固态器件。横向TE需要具有大Nernst效应的材料，这通常需要强外加磁场。然而，具有磁序的拓扑材料通过反常霍尔效应和伴随的反常Nernst效应（ANE）提供了另一种实现大Nernst的途径，这些效应来源于带拓扑结构。在这里，我们表明，YbMnBi2具有低霍尔密度和化学势接近外尔点，据我们所知，其ANP主导的Nernst热电势是任何磁性材料中最高的，约为$S_{yx}$110$\mu$V/K（$T$= 254 K，5 T <$|\mu_0 H|$< 9 T沿自旋倾斜方向施加），这是由于填充电子带的经典贡献、来自拓扑起源的大霍尔电导率以及大的电阻率各向异性的协同作用。观察到了显著的热霍尔角$0.02 < (\nabla_y T)/(\nabla_x T) < 0.06$（40 K <$T$< 310 K，$\mu_0 H$= 9 T）。 显示英文摘要

摘要： Thermoelectrics (TEs) are solid-state devices that can realize heat-electricity conversion. Transverse TEs require materials with a large Nernst effect, which typically requires a strong applied magnetic field. However, topological materials with magnetic order offer an alternative pathway for achieving large Nernst via the anomalous Hall effect and the accompanying anomalous Nernst effect (ANE) that arise from band topology. Here, we show that YbMnBi2 with a low Hall density and a chemical potential near the Weyl points has, to the best of our knowledge, the highest ANE-dominated Nernst thermopower of any magnetic material, with $S_{yx}$ around 110 $\mu$V/K ($T$ = 254 K, 5 T < $|\mu_0 H|$ < 9 T applied along the spin canting direction), due to the synergism between classical contributions from filled electron bands, large Hall conductivity of topological origin, and large resistivity anisotropy. An appreciable thermal Hall angle of $0.02 < (\nabla_y T)/(\nabla_x T) < 0.06$ was observed (40 K < $T$ < 310 K, $\mu_0 H$ = 9 T).