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.
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)
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。
