Dynamical Effects in Resonant X-Ray Diffraction.
Dynamical Effects in Resonant X-Ray Diffraction.
复制标题
共振 X 射线衍射的动力学效应
DOI：
10.1103/physrevlett.117.115501
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发表时间：
2016
影响因子：
8.6
通讯作者：
M. W. Haverkort
中科院分区：
文献类型：
--
作者：
S. Macke;J. E. Hamann-Borrero;R. J. Green;B. Keimer;G. A. Sawatzky;M. W. Haverkort
利用共振磁衍射在niege在asphalt晶格，我们表明，超出标准的运动学近似的动力学效应可以大大修改的共振散射截面。特别地，消光和折射的组合将衍射强度的方位角依赖性中的最大值转换为最小值，这通常用于通过共振X射线衍射确定轨道和磁性结构。我们提供了一个全面的理论描述，这些影响的数值求解麦克斯韦方程组在三维空间。动态衍射的理解和描述增强了共振x射线散射作为固体中电子有序现象的探针的能力。
Using resonant magnetic diffraction at the Niedge in asuperlattice, we show that dynamical effects beyond the standard kinematic approximation can drastically modify the resonant scattering cross section. In particular, the combination of extinction and refraction convert maxima to minima in the azimuthal-angle dependence of the diffracted intensity, which is commonly used to determine orbital and magnetic structures by resonant x-ray diffraction. We provide a comprehensive theoretical description of these effects by numerically solving Maxwell’s equations in three dimensions. The understanding and description of dynamical diffraction enhances the capabilities of resonant x-ray scattering as a probe of electronic ordering phenomena in solids.