论文标题
尼科蒙加季素赫斯勒化合物中的带状诱导的浆果通量和固有的异常大厅电导率
Band splitting induced Berry flux and intrinsic anomalous Hall conductivity in NiCoMnGa quaternary Heusler compound
论文作者
论文摘要
由于其独特的频带结构和可能的旋转型应用，因此，赫斯勒化合物的异常运输特性成为近年来研究的热点。在本文中，我们报告了通过实验手段和理论计算的多晶尼古斯季季凯斯勒化合物中的异常霍尔效应。在10K处发现了约256 s/cm的实验异常电导率（AHC），固有贡献约为121 s/cm。 HALL数据的分析揭示了AHE中外在和内在贡献的存在。我们的理论计算表明，一对由FERMI级别的自旋轨道相互作用（SOI）引起的频带分裂形成的旋转轨道耦合条带在系统中会产生有限的浆果通量，该浆果通量可提供约100 s/cm的固有AHC，这与实验非常吻合。
The anomalous transport properties of Heusler compounds become a hotspot of research in recent years due to their unique band structure and possible application in spintronics. In this paper, we report the anomalous Hall effect in polycrystalline NiCoMnGa quaternary Heusler compound by experimental means and theoretical calculations. The experimental anomalous Hall conductivity (AHC) was found at about 256 S/cm at 10K with an intrinsic contribution of ~ 121 S/cm. The analysis of Hall data reveals the presence of both extrinsic and intrinsic contributions in AHE. Our theoretical calculations show that a pair of spin-orbit coupled band formed by the band splitting due to spin-orbit interaction (SOI) at the Fermi level produces a finite Berry flux in the system that provides the intrinsic AHC about 100 S/cm, which is in good agreement with the experiment.
