Dynamic diffraction effects and coherent breathing oscillations in ultrafast electron diffraction in layered 1<i>T</i>-TaSeTe
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- Linlin Wei
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Shuaishuai Sun
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Cong Guo
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Zhongwen Li
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Kai Sun
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Yu Liu
- Chinese Academy of Sciences 3 Key Laboratory of Materials Physics, Institute of Solid State Physics, , Hefei 230031, China
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- Wenjian Lu
- Chinese Academy of Sciences 3 Key Laboratory of Materials Physics, Institute of Solid State Physics, , Hefei 230031, China
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- Yuping Sun
- Chinese Academy of Sciences 4 High Magnetic Laboratory, , Hefei 230031, China
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- Huanfang Tian
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Huaixin Yang
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
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- Jianqi Li
- Chinese Academy of Sciences 1 Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, , Beijing 100190, China
説明
<jats:p>Anisotropic lattice movements due to the difference between intralayer and interlayer bonding are observed in the layered transition-metal dichalcogenide 1T-TaSeTe following femtosecond laser pulse excitation. Our ultrafast electron diffraction investigations using 4D-transmission electron microscopy (4D-TEM) clearly reveal that the intensity of Bragg reflection spots often changes remarkably due to the dynamic diffraction effects and anisotropic lattice movement. Importantly, the temporal diffracted intensity from a specific crystallographic plane depends on the deviation parameter s, which is commonly used in the theoretical study of diffraction intensity. Herein, we report on lattice thermalization and structural oscillations in layered 1T-TaSeTe, analyzed by dynamic diffraction theory. Ultrafast alterations of satellite spots arising from the charge density wave in the present system are also briefly discussed.</jats:p>
収録刊行物
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- Structural Dynamics
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Structural Dynamics 4 (4), 2017-03-30
AIP Publishing
