Pr $_x$ Y $_{1-x}$ Ba $_2$ Cu $_3$ O $_{6+δ}$中三维电荷有序的面间轨道杂化稳定
Stabilization of three-dimensional charge order through interplanar orbital hybridization in Pr$_x$Y$_{1-x}$Ba$_2$Cu$_3$O$_{6+δ}$
摘要：
3 $d$ -轨道的形状通常决定相关过渡金属氧化物的电子和磁性。在超导铜氧化物中，$d_{x^2-y^2}$轨道的平面限制决定了非常规超导电性和竞争电荷序的二维性质。实现电子结构的轨道特异性控制以允许跨相邻平面的耦合路径将使得能够直接评估维度在交织顺序中的作用。利用$L_3$和$M_5$共振X射线散射和第一性原理计算，我们报道了Pr取代的YBaPDMATHABMQCuPDMATHABMRO $_{7}$中的高度相关的三维电荷序，其中PrPDMATHABMT-电子在CuO $_2$平面之间建立了直接的轨道桥.有了这个，我们证明了面间轨道工程可用于外科手术控制相关氧化物和其他层状材料中的电子相。
英文摘要：
The shape of 3$d$-orbitals often governs the electronic and magnetic properties of correlated transition metal oxides. In the superconducting cuprates, the planar confinement of the $d_{x^2-y^2}$ orbital dictates the two-dimensional nature of the unconventional superconductivity and a competing charge order. Achieving orbital-specific control of the electronic structure to allow coupling pathways across adjacent planes would enable direct assessment of the role of dimensionality in the intertwined orders. Using Cu-$L_3$ and Pr-$M_5$ resonant x-ray scattering and first-principles calculations, we report a highly correlated three-dimensional charge order in Pr-substituted YBa$_2$Cu$_3$O$_{7}$, where the Pr $f$-electrons create a direct orbital bridge between CuO$_2$ planes. With this, we demonstrate that interplanar orbital engineering can be used to surgically control electronic phases in correlated oxides and other layered materials.
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