论文标题
dyba $ _2 $ cu $ _3 $ o $ _ {6+x} $ thin膜探测的X射线散射探测的薄膜
Imprint of charge and oxygen orders on Dy ions in DyBa$_2$Cu$_3$O$_{6+x}$ thin films probed by resonant x-ray scattering
论文作者
论文摘要
我们在Cu $ l_3 $和dy $ m_5 $边缘的谐振弹性X射线散射中调查了不足的dyba $ _2 $ _2 $ _2 $ _3 $ _3 $ o $ $ _ {6+x} $（dybco）ndgao $ _3 $（1100000）的薄膜。这些膜在电荷砂层中显示出具有短距离II氧气的矫正晶体结构。在DY $ M_5 $边缘，我们观察到与CuO $ _2 $平面和Ortho-II氧气中的二维电荷密度波和二维电荷密度波的衍射峰，表明在稀有的肉体sublattice上形成了诱导有序状态。谐振衍射峰的强度表现出对外部磁场的非单调依赖性。通过电荷和氧气顺序捕获磁场，温度和光子能量依赖性的显着特征，对染料位点调节的模型计算散射强度的显着特征。
We used resonant elastic x-ray scattering at the Cu $L_3$ and Dy $M_5$ edges to investigate charge order in thin films of underdoped DyBa$_2$Cu$_3$O$_{6+x}$ (DyBCO) epitaxially grown on NdGaO$_3$ (110) substrates. The films show an orthorhombic crystal structure with short-range ortho-II oxygen order in the charge-reservoir layers. At the Dy $M_5$ edge we observe diffraction peaks with the same planar wavevectors as those of the two-dimensional charge density wave in the CuO$_2$ planes and of the ortho-II oxygen order, indicating the formation of induced ordered states on the rare-earth sublattice. The intensity of the resonant diffraction peaks exhibits a non-monotonic dependence on an external magnetic field. Model calculations on the modulation of the crystalline electric field at the Dy sites by charge and oxygen order capture the salient features of the magnetic field, temperature, and photon energy dependence of the scattering intensity.
