论文标题
X2MNO4中的Weyl型节点链（X = Li，Na）
Weyl-type nodal chains in X2MnO4 (X= Li, Na)
论文作者
论文摘要
最近，由于磁性拓扑半学在旋转型领域的潜在应用，因此受到了很多关注。通过使用第一原理计算，我们提出X2MNO4（X = Li，NA）的两种铁磁尖晶石材料在费米水平上具有Weyl型淋巴结链。它们的稳定性通过凝聚力，声子分散和弹性常数来验证。节点链由两种类型的节点环组成，这些循环由Glide操作MZ，Mirror Operation M101及其等效构成。在（001）表面上观察到鼓头表面状态，它们表现出非平凡的拓扑特征。另外，在不同的电子相关性和晶格菌株下，这两种材料的半准状态得到很好的保留。我们的工作提供了两个有希望的候选人，用于探索磁性材料和拓扑半学状态的组合。
Recently, magnetic topological semimetals have received a lot of attention due to their potential applications in the field of spintronics. By using first-principles calculations, we propose that two ferromagnetic spinel materials of X2MnO4 (X=Li, Na) have Weyl-type nodal chains around the Fermi level. Their stabilities are validated by cohesive energies, phonon dispersions, and elastic constants. The nodal chains are composed of two types of nodal loops, which are protected by the glide operation Mz, the mirror operation M101 and their equivalent. The drumhead surface states are observed on the (001) surface and they exhibit nontrivial topological features. In addition, under different electron correlations and lattice strains, the semimetal states of these two materials are well kept. Our work provides two promising candidates for exploring the combination of magnetic materials and topological semimetal states.
