论文标题
IRF4：从四面体指南针模型到拓扑半学
IrF4: From Tetrahedral Compass Model to Topological Semimetal
论文作者
论文摘要
拓扑，对称性和磁性的相交产生了可能相的丰富结构。在这项工作中，我们从理论上研究了磁性对IRF4的后果，IRF4最近被确定为在没有磁性的情况下可能是候选拓扑结节链的半学。我们表明，IR矩的自旋轨道性质产生了强烈的各向异性磁耦合，类似于钻石晶格上的四面体指南针模型。预测的磁接地状态保留了保护节点线的关键对称性，从而使它们在平均场水平上持续到有序相位。还讨论了其他对称性减少的后果。
The intersection of topology, symmetry, and magnetism yields a rich structure of possible phases. In this work, we study theoretically the consequences of magnetism on IrF4, which was recently identified as a possible candidate topological nodal chain semimetal in the absence of magnetic order. We show that the spin-orbital nature of the Ir moments gives rise to strongly anisotropic magnetic couplings resembling a tetrahedral compass model on a diamond lattice. The predicted magnetic ground state preserves key symmetries protecting the nodal lines, such that they persist into the ordered phase at the mean-field level. The consequences for other symmetry reductions are also discussed.
