论文标题
Weyl材料中的同时stagrater特征，以增强异常的Nernst电导率
Coactive-Staggered Feature in Weyl Materials for Enhancing the Anomalous Nernst Conductivity
论文作者
论文摘要
由于横向几何形状，通过异常的Nernst效应发电量比常规热电学具有多个优点。但是，在大多数已知材料中，异常的Nernst电导率（ANC）的大小太小而无法实际使用，并且很少有指导原理可以找到具有最佳热电特性的材料。这项工作表明，当异常的霍尔电导率（AHC）中有``同时stagger stagger''特征时，ANC是最大的。这表明两个Weyl对的最小排列会导致这样的特征，并调整对ANC的温度最大程度的启动的温度，从而使ANC的温度最大。可以通过菌株集体调整Weyl点的位置以进一步增强ANC的20％扩增，即使在Weyl Point位置的变化相对较小的情况下，可以利用Heusler材料中的现有同时安装的AHC。
Power generation through the anomalous Nernst effect in topological Weyl materials has several advantages over conventional thermoelectrics due to the transverse geometry. However, the magnitude of the anomalous Nernst conductivity (ANC) in most known materials is too small to be of practical use, and there exist few guiding principles for finding materials with optimal thermoelectric properties. This work shows that the ANC is maximal when there is a ``coactive-staggered" feature in the anomalous Hall conductivity (AHC). It is shown that a minimal arrangement of two Weyl pairs leads to such a feature, and tuning the separations between the pairs controls the temperature at which the ANC is maximal. Several methods are proposed for creating such arrangements of Weyl points starting from Dirac semimetal materials. It is also demonstrated how an existing coactive-staggered AHC in a Heusler material can be exploited, by collectively tuning the positions of the Weyl points through strain to further enhance the ANC. A modest 20% amplification of the ANC is achieved, even with relatively minor changes in Weyl point positions.
