论文标题
调谐电荷密度波订单和Kagome金属中的超导性KV $ _3 $ _3 $ sb $ _ {5-x} $ sn $ _x $和rbv $ _3 $ _3 $ sb $ _ {5-x} $ sn $ _x $ _x $
Tuning charge-density wave order and superconductivity in the kagome metals KV$_3$Sb$_{5-x}$Sn$_x$ and RbV$_3$Sb$_{5-x}$Sn$_x$
论文作者
论文摘要
$ _3 $ sb $ _5 $（a = k，rb，cs）kagome金属的家族表现出电荷密度波（CDW）订单，建议是手性的，然后是较低的温度超导状态。最近的研究提出了带有Fermi能量的带状结构鞍点在管理这两个过渡中的重要性。在这里，我们显示了通过SN将SB化学替换为SB实现的效果在CDW和CDW和超导状态下，在KV $ _3 $ _3 $ _5 $ _5 $和RBV $ _3 $ SB $ _5 $中，并生成相图。兴奋剂兴奋剂将$γ$ Pocket和van Hove奇点（VHS）提升到$ e_f $，从而导致两个系统中的超导$ T_C $增加到约4.5 K，同时迅速抑制CDW状态。
The family of AV$_3$Sb$_5$ (A = K, Rb, Cs) kagome metals exhibit charge density wave (CDW) order, proposed to be chiral, followed by a lower temperature superconducting state. Recent studies have proposed the importance of band structure saddle points proximal to the Fermi energy in governing these two transitions. Here we show the effects of hole-doping achieved via chemical substitution of Sn for Sb on the CDW and superconducting states in both KV$_3$Sb$_5$ and RbV$_3$Sb$_5$, and generate a phase diagram. Hole-doping lifts the $Γ$ pocket and van Hove singularities (vHs) toward $E_F$ causing the superconducting $T_C$ in both systems to increase to about 4.5 K, while rapidly suppressing the CDW state.
