论文标题
CSV $ _3 $ SB $ _5 $：A $ \ MATHBB {Z} _2 $拓扑kagome Metal具有超导地面状态
CsV$_3$Sb$_5$: a $\mathbb{Z}_2$ topological kagome metal with a superconducting ground state
论文作者
论文摘要
最近与其姐妹化合物一起发现了KV $ _3 $ SB $ _5 $和RBV $ _3 $ SB $ _5 $，CSV $ _3 $ _3 $ SB $ _5 $ _5 $ CRYCHALLALLISE CRYCRALLALLIALS通过理想的货物钒网络和抗巨烯层网络与碱金属分离。这项工作介绍了CSV $ _3 $ sb $ _5 $的电子特性，展示了单晶的散装超导性，其t $ _ {c} = 2.5 $ k。通过角度分辨光发射光谱（ARPES）和密度功能理论（DFT）研究了正常的状态电子结构，将CSV $ _3 $ SB $ _5 $分类为$ \ MATHBB {Z} _2 _2 _2 _2 $拓扑金属。预测多个受保护的狄拉克交叉口将与费米水平（$ e_f $）紧密地预测，并且高温充电密度波动的不稳定也表明了正常状态相关效应的签名。讨论了该材料中非常规超导性形成的影响。
Recently discovered alongside its sister compounds KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, CsV$_3$Sb$_5$ crystallizes with an ideal kagome network of vanadium and antimonene layers separated by alkali metal ions. This work presents the electronic properties of CsV$_3$Sb$_5$, demonstrating bulk superconductivity in single crystals with a T$_{c} = 2.5$K. The normal state electronic structure is studied via angle-resolved photoemission spectroscopy (ARPES) and density functional theory (DFT), which categorize CsV$_3$Sb$_5$ as a $\mathbb{Z}_2$ topological metal. Multiple protected Dirac crossings are predicted in close proximity to the Fermi level ($E_F$), and signatures of normal state correlation effects are also suggested by a high temperature charge density wave-like instability. The implications for the formation of unconventional superconductivity in this material are discussed.
