Dynamic diffraction effects and coherent breathing oscillations in ultrafast electron diffraction in layered 1T-TaSeTe
作者： Linlin Wei , Shuaishuai Sun , Cong Guo , Zhongwen Li , Kai Sun
DOI: 10.1063/1.4979643
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摘要: Anisotropic lattice movements due to the difference between intralayer and interlayer bonding are observed in layered transition-metal dichalcogenide 1T-TaSeTe following femtosecond laser pulse excitation. Our ultrafast electron diffraction investigations using 4D-transmission microscopy (4D-TEM) clearly reveal that intensity of Bragg reflection spots often changes remarkably dynamic effects anisotropic movement. Importantly, temporal diffracted from a specific crystallographic plane depends on deviation parameter s, which is commonly used theoretical study intensity. Herein, we report thermalization structural oscillations 1T-TaSeTe, analyzed by theory. Ultrafast alterations satellite arising charge density wave present system also briefly discussed.
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