The unconventional normal-state properties of the cuprates are often discussed in terms of emergent electronic order that onsets below a putative critical doping of x_c ≈ 0.19. Charge density wave (CDW) correlations represent one such order; however, experimental evidence for such order generally spans a limited range of doping that falls short of the critical value x_c, leading to questions regarding its essential relevance. Here, we use X-ray diffraction to demonstrate that CDW correlations in La_2−xSr_xCuO₄ persist up to a doping of at least x = 0.21. The correlations show strong changes through the superconducting transition, but no obvious discontinuity through x_c ≈ 0.19, despite changes in Fermi surface topology and electronic transport at this doping. These results demonstrate the interaction between CDWs and superconductivity even in overdoped cuprates and prompt a reconsideration of the role of CDW correlations in the high-temperature cuprate phase diagram.

铜酸盐的非传统的正常状态属性通常在声母以下的推定临界掺杂射电子订单来讨论X _Ç  ≈0.19。电荷密度波（CDW）的相关性代表一种这样的顺序；然而，这种顺序的实验证据通常跨越有限的掺杂范围，其低于临界值x _c，从而导致对其实质相关性的质疑。在这里，我们使用X射线衍射来证明La _{2− x} Sr _x CuO ₄中的CDW相关性一直持续到至少x的掺杂。 = 0.21。的相关性表明，通过超导转变强的变化，但通过没有明显的不连续X _Ç  ≈0.19，尽管在这种掺杂在费米表面拓扑结构和电子运输的变化。这些结果表明，即使在掺杂过量的铜酸盐中，CDW和超导之间也存在相互作用，并促使人们重新考虑CDW相关性在高温铜酸盐相图中的作用。