论文标题
Ndalsi中的Weyl Fermions介导的不一致的磁性
Incommensurate magnetism mediated by Weyl fermions in NdAlSi
论文作者
论文摘要
Weyl半法中的新出现的相对论准颗粒是外来电子特性的来源，例如表面费米弧，异常的霍尔效应和负磁磁性，所有这些都是在实际材料中观察到的。尽管这些现象突出了Weyl Fermions对电子传输特性的影响，但对它们可能支持哪些集体现象的了解却鲜为人知。在这里，我们报告了一个新的Weyl半学Ndalsi，提供了一个例子。使用中子衍射，我们报告了NDALSI中的长波长磁顺序，其周期性与两个拓扑非平凡的费米口袋之间的嵌套载体有关，我们使用密度功能理论和量子振荡测量来表征它们。我们的工作提供了一个罕见的韦尔费米子驱动集体磁性的例子。
Emergent relativistic quasiparticles in Weyl semimetals are the source of exotic electronic properties such as surface Fermi arcs, the anomalous Hall effect, and negative magnetoresistance, all observed in real materials. Whereas these phenomena highlight the effect of Weyl fermions on the electronic transport properties, less is known about what collective phenomena they may support. Here, we report a new Weyl semimetal, NdAlSi that offers an example. Using neutron diffraction, we report a long-wavelength magnetic order in NdAlSi whose periodicity is linked to the nesting vector between two topologically non-trivial Fermi pockets, which we characterize using density functional theory and quantum oscillation measurements. Our work provides a rare example of Weyl fermions driving collective magnetism.
