Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect
Type
ArticleKAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2021-01-21Submitted Date
2020-09-18Permanent link to this record
http://hdl.handle.net/10754/667086
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Show full item recordAbstract
Coherent phonon excitation via femtosecond laser pulses can be used to control physical properties of matter, and enhancing coherent phonon excitation is highly relevant. Here, we report the strong enhancement of coherent phonon excitation in Fe3GeTe2 (FGT) via the resonance Raman effect. On the basis of the femtosecond transient optical spectroscopy measurements, the A1g coherent phonon excitation in FGT is obtained as a function of pump photon energy. Its excitation can be maximized by tuning the pump photon energy. The maximum coherent phonon excitation at the 1.574-eV pump photon energy corresponds to an electronic transition in FGT, and is a direct result of the resonance Raman effect. The A1g coherent phonon generation follows the impulsive stimulated Raman scattering mechanism. Our work demonstrates that the resonance Raman effect can be an effective way to enhance coherent phonon excitation via electronic excitation.Citation
Guo, J., Zhang, C., Liang, W., Zhang, X.-X., & Luo, S. N. (2021). Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect. Physical Review B, 103(2). doi:10.1103/physrevb.103.024302Sponsors
This work was sponsored by Southwest Jiaotong University.Publisher
American Physical Society (APS)Journal
Physical Review BAdditional Links
https://link.aps.org/doi/10.1103/PhysRevB.103.024302ae974a485f413a2113503eed53cd6c53
10.1103/physrevb.103.024302