Local Atomic Structure of Non-Periodic Solids

该建议将衍射分析应用于局部原子 晶体固体的结构，特别是超导体 氧化物和相关材料。 最初的研究包括 脉冲中子粉末衍射动力学（Plazcek 修正）和直接观察晶格动力学使用 脉冲中子 这项研究是其次是衍射研究 利用二维对的新技术， 分布函数分析 观察结果在 超导电性机制的背景， 载流子引起的局部晶格变形（极化子形成）。 在 在这些研究过程中，我们采用了真实的空间衍射方法 分析得到进一步发展。 %%% 从这些实验中得到的数据与以下方面有关： 进一步了解高分子的微观机制， 温度超导性

This proposal applies diffraction analysis to the local atomic structure of crystalline solids, in particular superconducting oxides and related materials. Initial studies include the effects of dynamics on the pulsed neutron powder diffraction (Plazcek correction) and the direct observation of lattice dynamics using pulsed neutrons. This research is followed by diffraction studies of single crystals using a novel technique of two-dimensional pair distribution function analysis. The observations are examined in the context of the mechanism of superconductivity based upon carrier-induced local lattice deformation (polaron formation). In the process of these studies the real space method of diffraction analysis is further developed. %%% The data derived from these experiments are pertinent to furthering the understanding of the microscopic mechanisms of high temperature superconductivity.