Theoretical Simulation of the Temporal Behavior of Bragg Diffraction Derived from Lattice Deformation  

作　　者：Cong Guo Shuai-Shuai Sun Lin-Lin Wei Huan-Fang Tian Huai-Xin Yang Shu Gao Yuan Tan Jian-Qi Li 过聪;孙帅帅;尉琳琳;田焕芳;杨槐馨;高舒;谭媛;李建奇(School of Physics and Information Engineering&Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan 430056,China;Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Collaborative Innovation Center of Quantum Matter,Beijing 100190,China)

机构地区：[1]School of Physics and Information Engineering&Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education,Jianghan University,Wuhan 430056,China [2]Beijing National Laboratory for Condensed Matter Physics,and Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [3]School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Collaborative Innovation Center of Quantum Matter,Beijing 100190,China

出　　处：《Chinese Physics Letters》2020年第7期71-74,共4页中国物理快报（英文版）

基　　金：Supported by the National Key Research and Development Program of China under Grant Nos.2016YFA0300303,2017YFA0504703,and 2017YFA0302904;the National Basic Research Program of China under Grant No.2015CB921304;the National Natural Science Foundation of China under Grant Nos.11604372,11474323,11774391,11774403,and 61575085;the Strategic Priority Research Program(B)of the Chinese Academy of Sciences under Grant No.XDB25000000;the Scientific Instrument Developing Project of the Chinese Academy of Sciences under Grant No.ZDKYYQ20170002。

摘　　要：A theoretical study on the structural dynamics of the temporal behavior of Bragg diffraction is presented and compared with experimental results obtained via ultrafast electron crystallography.In order to describe the time-dependent lattices and calculate the Bragg diffraction intensity,we introduce the basic vector offset matrix,which can be used to quantify the shortening,lengthening and rotation of the three lattice vectors(i.e.,lattice deformation).Extensive simulations are performed to evaluate the four-dimensional electron crystallography model.The results elucidate the connection between structural deformations and changes in diffraction peaks,and sheds light on the quantitative analysis and comprehensive understanding of the structural dynamics.

关 键 词：dynamics. STRUCTURAL LATTICE 

分 类 号：O731[理学—晶体学]