论文标题
关于三维Nexus三个点归化性的拓扑特征
On the topological character of three-dimensional Nexus triple point degeneracies
论文作者
论文摘要
最近，一类通用的三维条带结构确定了宿主在三倍或三个点退化的宿主二分化会议上会议，这种脱位均与狄拉克/韦尔半量法中的隔离点脱落相同的通常拓扑表征。对于这些所谓的``nexus''费物，超出了dirac/weyl fermions，我们提出了几个概念来表征波函数的几何形状并阐明其拓扑结构。我们的方法是基于对Nexus波构件的分析属性的理解，这些构图是在最近对我们的二维类似物进行了分类。我们使用了三维的类似物。我们在the nexifificative interifific comperifific comperifific corterififice cormentifie down in yexififice cornexifie。 方面。
Recently a generic class of three-dimensional band structures was identified that host two-fold line degeneracies meeting at three-fold or triple point degeneracies, which resist the usual topological characterization of isolated point degeneracies as in Dirac/Weyl semimetals. For these so-called ``Nexus" fermions which lie beyond Dirac/Weyl fermions, we lay out several concepts to characterize the wavefunction geometry and spell out its topology. Our approach is based on an understanding of the analyticity properties of Nexus wavefunctions building on a two-dimensional analogue studied recently by us. We use this to write down a homological classification of various Nexus triple point degeneracies in three dimensions.
