科技简报
本工作提出了反常霍尔角的双变量数学公式及实验调控方案。在Co₃Sn₂S₂体系中进行了实验设计和验证，获得了25°(46%)的零场巨反常霍尔角。在磁性外尔半金属的反常霍尔传感器件中获得了低频23nT/Hz0.5@1Hz的磁场探测能力和7028μΩcm/T的霍尔灵敏度。该研究为反常霍尔角的调控提供了一套可行的方案，开启了磁性材料巨反常霍尔角的新阶段，实现了拓扑增强高性能磁传感的原理性验证。

This study proposes a bivariate mathematical formula and an experimental modulation scheme for the anomalous Hall angle. A zero-field giant anomalous Hall angle of 25° (46%) was obtained in the Co3Sn2S2 system. Furthermore, in magnetic Weyl semimetal anomalous Hall sensing devices, a magnetic field detectability of 23 nT/Hz0.5 at 1 Hz and a Hall sensitivity of 7028 μΩcm/T were realized.
 

研究发现，作为表征横向热电性能的重要参数，反常能斯特热电导率（ANC），与反常霍尔角（AHA）和反常能斯特角（ANA）之和密切相关。理论以及实验都表明在一个特定体系中，AHA的符号相对稳定，而ANA的符号较容易变化。本工作我们在Fe掺杂的Co₃Sn₂S₂中进行的热输运实验观察到ANC增加了82.4%，证实了这一调控方法的有效性。

The research reveals that the magnitude of the ANC is directly related to the sum of the anomalous Nernst and Hall angles. While the sign of the anomalous Hall angle is relatively stable in a certain material, the sign of the anomalous Nernst angle can be intrinsically tuned. Therefore, the ANC can be effectively optimized by regulating these angles to work in concert.