论文标题
超过圆顶之外的过量库酸盐中的盛行充电订单
Prevailing charge order in overdoped cuprates beyond the superconducting dome
论文作者
论文摘要
通常认为极其过多的铜层是没有异国命令的费米液体金属，而较低的铜层港口交织在一起的状态。与这种传统智慧相反，使用Cu $ L_3 $ Edge和O $ K $ Edge共鸣X射线散射，我们在超过的LA $ _ {2-X} $ _x $ _x $ _x $ _4 $ _4 $（0.35 $ \ leq $ x $ x $ x $ x $ \ leq $ 0.6）以外超级dosedomedome domome domomdsing domomdsing domosedome d。该公司的周期性为$ \ sim $ 6晶格单元，相关长度为$ \ sim 3-20 $晶格单元。它显示出与不足的酸奶的CO相似的平面内动量和极化依赖性和分散激励，但其最大强度沿C方向差异，并且最多可以持续300 k。我们的结果表明，在减少孔载体后，CO在过多的金属状态中占上风，超导性出现了。
The extremely overdoped cuprates are generally considered to be Fermi liquid metals without exotic orders, whereas the underdoped cuprates harbor intertwined states. Contrary to this conventional wisdom, using Cu $L_3$ edge and O $K$ edge resonant x-ray scattering, we reveal a charge order (CO) in overdoped La$_{2-x}$Sr$_x$CuO$_4$ (0.35 $\leq$ x $\leq$ 0.6) beyond the superconducting dome. This CO has a periodicity of $\sim$ 6 lattice units with correlation lengths of $\sim 3 - 20$ lattice units. It shows similar in-plane momentum and polarization dependence and dispersive excitations as the CO of underdoped cuprates, but its maximum intensity differs along the c-direction and persists up to 300 K. This CO cannot be explained by either the Fermi surface instability or the doped Hubbard model and its origin remains to be understood. Our results suggest that CO is prevailing in the overdoped metallic regime and superconductivity emerges out of the CO phase upon decreasing hole carriers.
