论文标题
3D费米表面来自分层CSV $ _3 $ sb $ _5 $的费用订单
3D Fermi surfaces from charge order in layered CsV$_3$Sb$_5$
论文作者
论文摘要
CSV $ _3 $ sb $ _5 $的电子阶段的级联级别提高了前景，使他们的相互互动消除了他们的互动，以干净，互动的kagome晶格。当kagome平面堆叠成晶体时，其电子维度编码了多少kagome物理学及其拓扑方面的生存。 CSV $ _3 $ SB $ _5 $的分层结构反映了Brillouin-Zone大小的准2D费米表面和大量的运输各向异性。但是，在这里，我们证明了CSV $ _3 $ SB $ _5 $是电荷密度波（CDW）状态内的三维金属。小型3D口袋在其低温磁和量子传输中起着至关重要的作用。它们在$ t_ {cdw} \ sim 93 $ k上的出现导致平面内磁性磁性突然增加4个数量级。这些3D口袋的存在通过面内磁场下的量子振荡进一步证实 - 证明了它们的闭合性质。这些结果强调了层中耦合对3D材料中Kagome物理学的影响。
The cascade of electronic phases in CsV$_3$Sb$_5$ raises the prospect to disentangle their mutual interactions in a clean, strongly interacting Kagome lattice. When the Kagome planes are stacked into a crystal, its electronic dimensionality encodes how much of the Kagome physics and its topological aspects survive. The layered structure of CsV$_3$Sb$_5$ reflects in Brillouin-zone-sized quasi-2D Fermi surfaces and a significant transport anisotropy. Yet here we demonstrate that CsV$_3$Sb$_5$ is a three-dimensional metal within the charge-density-wave (CDW) state. Small 3D pockets play a crucial role in its low-temperature magneto- and quantum transport. Their emergence at $T_{CDW}\sim 93$ K results in an anomalous sudden increase of the in-plane magnetoresistance by 4 orders of magnitude. The presence of these 3D pockets is further confirmed by quantum oscillations under in-plane magnetic fields - demonstrating their closed nature. These results emphasize the impact of interlayer coupling on the Kagome physics in 3D materials.
