论文标题
在Weyl Semimetal Eucd $ _2 $ $ _2 $的磁过渡温度上方和下方的非常规横向运输
Unconventional transverse transport above and below the magnetic transition temperature in Weyl semimetal EuCd$_2$As$_2$
论文作者
论文摘要
这是对量子异常霍尔效应的兴趣日益增长的例证，对拓扑的研究作为量子物质的组织原理的研究大大富含与磁性的相互作用。在这种情况下，我们提出了一项关于磁性Weyl Semimetal Eucd $ _2 $的电气和热电传输研究，为$ _2 $。观察到对异常大厅的非常规贡献，并且在EUCD $ _2 $的磁性转变温度上均观察到异常的Nernst效应为$ _2 $，表明存在明显的浆果曲率。 EUCD $ _2 $ AS $ _2 $代表了一种罕见的情况，在同一材料中，这种非常规横向运输在磁过渡温度上方和之下出现。转运性能以与顺磁相不同的方式随温度和田地演变而成，这表明其起源的机制不同。我们的结果表明，EUCD $ _2 $作为$ _2 $是一个肥沃的游乐场，用于研究磁力和拓扑之间的相互作用，并且可能是植根于此相互作用的大量拓扑非平凡的阶段。
As exemplified by the growing interest in the quantum anomalous Hall effect, the research on topology as an organizing principle of quantum matter is greatly enriched from the interplay with magnetism. In this vein, we present a combined electrical and thermoelectrical transport study on the magnetic Weyl semimetal EuCd$_2$As$_2$. Unconventional contribution to the anomalous Hall and anomalous Nernst effects were observed both above and below the magnetic transition temperature of EuCd$_2$As$_2$, indicating the existence of significant Berry curvature. EuCd$_2$As$_2$ represents a rare case in which this unconventional transverse transport emerges both above and below the magnetic transition temperature in the same material. The transport properties evolve with temperature and field in the antiferromagnetic phase in a different manner than in the paramagnetic phase, suggesting different mechanisms to their origin. Our results indicate EuCd$_2$As$_2$ is a fertile playground for investigating the interplay between magnetism and topology, and potentially a plethora of topologically nontrivial phases rooted in this interplay.
