论文标题
YBA $ _2 $ CU $ _3 $ o $ _ {6.67} $在单轴压缩下探测的X射线散射中的电荷密度波
Charge density waves in YBa$_2$Cu$_3$O$_{6.67}$ probed by resonant x-ray scattering under uniaxial compression
论文作者
论文摘要
我们报告了一项全面的cu l $ _3 $ - 边缘共振X射线散射研究，对二维和三维（2D和3D）不一致的电荷相关性在不足的高温超导体超导体yba $ _2 $ _2 $ _2 $ _3 $ _3 $ $ _67 $ _ {6.67} $ 1％的单晶中，cu $ _2 Cu-O-Cu债券指示（A和B）在CuO $ _2 $飞机中。 2D电荷相关性的压力响应是对称的：沿B沿B增强相关性的压力，反之亦然。我们的结果表明，基础订单参数是单轴的。相反，仅在沿B响应a沿B沿B沿B沿B的远程充电顺序。光谱谐振X射线散射测量表明，3D电荷顺序仅存在于CUO $ _2 $飞机中，因此可能对铜矿是一般的。我们讨论了这些结果对电子词的模型以及电荷顺序和超导性之间的相互作用的含义。
We report a comprehensive Cu L$_3$-edge resonant x-ray scattering study of two- and three-dimensional (2D and 3D) incommensurate charge correlations in single crystals of the underdoped high-temperature superconductor YBa$_2$Cu$_3$O$_{6.67}$ under uniaxial compression up to 1% along the two inequivalent Cu-O-Cu bond directions (a and b) in the CuO$_2$ planes. The pressure response of the 2D charge correlations is symmetric: pressure along a enhances correlations along b, and vice versa. Our results imply that the underlying order parameter is uniaxial. In contrast, 3D long-range charge order is only observed along b in response to compression along a. Spectroscopic resonant x-ray scattering measurements show that the 3D charge order resides exclusively in the CuO$_2$ planes and may thus be generic to the cuprates. We discuss implications of these results for models of electronic nematicity and for the interplay between charge order and superconductivity.
