论文标题
费米 - arc金属
Fermi-arc metals
论文作者
论文摘要
我们预测了一种新型的金属状态，该物质在具有空间变化的Weyl节点位置的Weyl-Sumimetal上层结构中出现。在新状态下，将韦尔节延伸到延伸的各向异性费米表面，可以理解为由费米弧状状态建造。这种“ Fermi-Arc金属”表现出父母Weyl半学的手性异常。然而，与父母的weyl半学不同，在费米 - arc金属中，“超量子状态”，其中异常的手性兰道水平是费米能量的唯一状态，在零磁场处已达到有限的能量窗口。超级量子状态的主导地位意味着通用的低场弹道磁性和缺乏量子振荡，使费米表面“不可见” De Haas-Van Alphen和Shubnikov-De Haas效应，尽管它在其他响应特性中表明其存在。
We predict a novel metallic state of matter that emerges in a Weyl-semimetal superstructure with spatially varying Weyl-node positions. In the new state, the Weyl nodes are stretched into extended, anisotropic Fermi surfaces, which can be understood as being built from Fermi arc-like states. This "Fermi-arc metal" exhibits the chiral anomaly of the parental Weyl semimetal. However, unlike in the parental Weyl semimetal, in the Fermi-arc metal the "ultra-quantum state", in which the anomalous chiral Landau level is the only state at the Fermi energy, is already reached for a finite energy window at zero magnetic field. The dominance of the ultra-quantum state implies a universal low-field ballistic magnetoconductance and the absence of quantum oscillations, making the Fermi surface "invisible" to de Haas-van Alphen and Shubnikov-de Haas effects, although it signifies its presence in other response properties.
