论文标题
Kagome超导体CSV $ _3 $ sb $ _ {5-x} $ sn $ _x $
Incommensurate charge-stripe correlations in the kagome superconductor CsV$_3$Sb$_{5-x}$Sn$_x$
论文作者
论文摘要
我们跟踪Kagome超导体CSV $ _3 $ sb $ _5 $中电荷相关性的演变，因为其父母长期以来的充电密度订单是不稳定的。掺杂掺杂时，层间电荷相关性迅速变短，并沿着层间方向降低了一半。除了第一个超导穹顶的峰值之外，母体电荷密度波状态消失并不稳定，准电荷相关性稳定在其位置。这些竞争性的单向电荷相关性表明，CSV $ _3 $ _3 $ sb $ _5 $中的固有的电子旋转对称性破坏，独立于母体电荷密度波状态，并揭示了这类Kagome超级负责人的电子相图上充电相关的复杂景观。我们的数据表明，固有的2 $ k_f $电荷不稳定性，竞争电荷不稳定性的现象学让人联想到几类非常规超导体中已经指出的内容。
We track the evolution of charge correlations in the kagome superconductor CsV$_3$Sb$_5$ as its parent, long-ranged charge density order is destabilized. Upon hole-doping doping, interlayer charge correlations rapidly become short-ranged and their periodicity is reduced by half along the interlayer direction. Beyond the peak of the first superconducting dome, the parent charge density wave state vanishes and incommensurate, quasi-1D charge correlations are stabilized in its place. These competing, unidirectional charge correlations demonstrate an inherent electronic rotational symmetry breaking in CsV$_3$Sb$_5$, independent of the parent charge density wave state and reveal a complex landscape of charge correlations across the electronic phase diagram of this class of kagome superconductors. Our data suggest an inherent 2$k_f$ charge instability and the phenomenology of competing charge instabilities is reminiscent of what has been noted across several classes of unconventional superconductors.
