| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Theoretical Simulation of the Temporal Behavior of Bragg Diffraction Derived from Lattice Deformation |
| Cong Guo1,2, Shuai-Shuai Sun2, Lin-Lin Wei2, Huan-Fang Tian2, Huai-Xin Yang2,3, Shu Gao1, Yuan Tan1, and Jian-Qi Li2,3,4* |
1School of Physics and Information Engineering & Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University, Wuhan 430056, China
2Beijing National Laboratory for Condensed Matter Physics, and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
3School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
4Collaborative Innovation Center of Quantum Matter, Beijing 100190, China
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| Cite this article: |
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Cong Guo, Shuai-Shuai Sun, Lin-Lin Wei et al 2020 Chin. Phys. Lett. 37 076301 |
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Abstract 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.
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Received: 15 April 2020
Published: 21 June 2020
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| PACS: |
63.10.+a
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(General theory)
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61.05.jd
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(Theories of electron diffraction and scattering)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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| Fund: 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, and the Scientific Instrument Developing Project of the Chinese Academy of Sciences under Grant No. ZDKYYQ20170002. |
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