论文标题
在常规和狄拉克载体的存在下，分层金属Fe1/4tas2中的铁磁磁性
Ferromagnetism in layered metallic Fe1/4TaS2 in the presence of conventional and Dirac carriers
论文作者
论文摘要
在本文中，我们介绍了Fe0.25TAS2及其有限温度的磁性特性的铁磁性的微观起源。我们首先通过第一原理计算获得Fe0.25TAS2的带结构，并发现金属FE0.25TAS2共存的常规和狄拉克载体。因此，考虑到Fe 3D离子的自旋轨道耦合，我们在存在常规抛物线寄生虫分散和dirac线性分散载体的情况下，在Fe旋转之间得出了有效的Rkky型哈密顿量，其中包含一个像Heisenberg类似于Heisenberg的样子，是类似于XY的XY样式和类似XY的术语。此外，我们使用簇自洽场方法获得了铁磁库里温度TC。我们的结果不仅可以解决高铁磁库里温度，还可以解决FexTAS2中的大磁各向异性。
In this paper we present the microscopic origin of the ferromagnetism of Fe0.25TaS2 and its finite-temperature magnetic properties. We first obtain the band structures of Fe0.25TaS2 by the first-principles calculations and find that both conventional and Dirac carriers coexist in metallic Fe0.25TaS2. Accordingly, considering the spin-orbit coupling of Fe 3d ion, we derive an effective RKKY-type Hamiltonian between Fe spins in the presence of both the conventional parabolic-dispersion and the Dirac linear-dispersion carriers, which contains a Heisenberg-like, an Ising-like and an XY-like term. In addition, we obtain the ferromagnetic Curie temperature Tc by using the cluster self-consistent field method. Our results could address not only the high ferromagnetic Curie temperature, but also the large magnetic anisotropy in FexTaS2.
