论文标题
非词性抗铁磁绝缘子中的巨大磁化率
Colossal magnetoresistance in a nonsymmorphic antiferromagnetic insulator
论文作者
论文摘要
在这里，我们研究了$ _ {2} $ _ {2} $ sb $ _ {6} $的反铁磁性EU $ _ {5} $，一个非甲状数Zintl阶段。我们的电气传输数据表明，欧盟$ _ {5} $ in $ _ {2} $ sb $ _ {6} $非常绝缘，并且表现出异常大的负负磁场，这与磁极的存在一致。 From {\it ab initio} calculations, the paramagnetic state of Eu$_{5}$In$_{2}$Sb$_{6}$ is a topologically nontrivial semimetal within the generalized gradient approximation (GGA), whereas an insulating state with trivial topological indices is obtained using a modified Becke-Johnson potential.值得注意的是，GGA+U计算表明，$ _ {2} $ _ {2} $ sb $ _ {6} $的eu $ _ {5} $的反铁磁相可能会托管一个斧头绝缘状态。我们的结果为拓扑分类的理论提供了重要的反馈，并突出了实现Zintl材料中清洁磁狭窄半导体的潜力。
Here we investigate antiferromagnetic Eu$_{5}$In$_{2}$Sb$_{6}$, a nonsymmorphic Zintl phase. Our electrical transport data show that Eu$_{5}$In$_{2}$Sb$_{6}$ is remarkably insulating and exhibits an exceptionally large negative magnetoresistance, which is consistent with the presence of magnetic polarons. From {\it ab initio} calculations, the paramagnetic state of Eu$_{5}$In$_{2}$Sb$_{6}$ is a topologically nontrivial semimetal within the generalized gradient approximation (GGA), whereas an insulating state with trivial topological indices is obtained using a modified Becke-Johnson potential. Notably, GGA+U calculations suggest that the antiferromagnetic phase of Eu$_{5}$In$_{2}$Sb$_{6}$ may host an axion insulating state. Our results provide important feedback for theories of topological classification and highlight the potential of realizing clean magnetic narrow-gap semiconductors in Zintl materials.
