论文标题
相互作用的I型和II型Weyl半度值的自旋密度波顺序
Spin density wave order in interacting type-I and type-II Weyl semimetals
论文作者
论文摘要
Weyl Semimetals具有三个维度的无质量线性分散手性费米的特征，为研究电子相互作用和拓扑的相互作用提供了一个绝佳的平台，并探索了物质的新相关状态。在这里，我们使用群集动态平均场理论和变异群集近似方法研究了局部排斥相互作用对破坏Weyl半分学模型的倒置对称性模型的影响。我们的分析表明，从相互作用的临界值处，从无间隙的Weyl半学相的连续过渡到间隙旋转密度波排序相位，这取决于频带结构参数。此外，我们在线性色散中引入了有限的倾斜度，并检查了II型Weyl Semimetal模型的相应行为，其中发现临界相互作用强度显着降低，表明对相互作用的敏感性更大。在半金属和磁有序状态下，都可以获得不同物理量的行为，例如双占用率，光谱函数和与Weyl节点相关的浆果曲率的行为。最后，作为倾斜参数的函数，我们为Weyl Semimetal模型提供了相互作用诱导的相图。
Weyl semimetals, featuring massless linearly dispersing chiral fermions in three dimensions, provide an excellent platform for studying the interplay of electronic interactions and topology, and exploring new correlated states of matter. Here, we examine the effect of a local repulsive interaction on an inversion-symmetry breaking Weyl semimetal model, using cluster dynamical mean field theory and variational cluster approximation methods. Our analysis reveals a continuous transition from the gapless Weyl semimetal phase to a gapped spin density wave ordered phase at a critical value of the interaction, which is determined by the band structure parameters. Further, we introduce a finite tilt in the linear dispersion and examine the corresponding behavior for a type-II Weyl semimetal model, where the critical interaction strength is found to be significantly diminished, indicating a greater susceptibility towards interactions. The behavior of different physical quantities, such as the double occupancy, the spectral function and the Berry curvature associated with the Weyl nodes are obtained in both the semimetallic and the magnetically ordered states. Finally, we provide an interaction-induced phase diagram for the Weyl semimetal model, as a function of the tilt parameter.
