Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect
KAUST DepartmentMaterial Science and Engineering Program
Physical Science and Engineering (PSE) Division
Permanent link to this recordhttp://hdl.handle.net/10754/667086
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AbstractCoherent 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.
CitationGuo, 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.103.024302
SponsorsThis work was sponsored by Southwest Jiaotong University.
PublisherAmerican Physical Society (APS)
JournalPhysical Review B