Enhanced coherent phonon excitation in 
Fe3GeTe2
 via resonance Raman effect

Jia Guo; Chenhui Zhang; Weizheng Liang; Xixiang Zhang; S. N. Luo

doi:10.1103/physrevb.103.024302

Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect

Jia Guo, Chenhui Zhang, Weizheng Liang, Xixiang Zhang, S. N. Luo

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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.

Original language	English (US)
Journal	Physical Review B
Volume	103
Issue number	2
DOIs	https://doi.org/10.1103/physrevb.103.024302
State	Published - Jan 21 2021

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title = "Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect",

abstract = "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.",

author = "Jia Guo and Chenhui Zhang and Weizheng Liang and Xixiang Zhang and Luo, {S. N.}",

note = "KAUST Repository Item: Exported on 2021-02-01 Acknowledgements: This work was sponsored by Southwest Jiaotong University.",

year = "2021",

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doi = "10.1103/physrevb.103.024302",

language = "English (US)",

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T1 - Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect

AU - Guo, Jia

AU - Zhang, Chenhui

AU - Liang, Weizheng

AU - Zhang, Xixiang

AU - Luo, S. N.

N1 - KAUST Repository Item: Exported on 2021-02-01 Acknowledgements: This work was sponsored by Southwest Jiaotong University.

PY - 2021/1/21

Y1 - 2021/1/21

N2 - 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.

AB - 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.

UR - http://hdl.handle.net/10754/667086

UR - https://link.aps.org/doi/10.1103/PhysRevB.103.024302

U2 - 10.1103/physrevb.103.024302

DO - 10.1103/physrevb.103.024302

M3 - Article

SN - 2469-9950

VL - 103

JO - Physical Review B

JF - Physical Review B

IS - 2

ER -

Enhanced coherent phonon excitation in Fe3GeTe2 via resonance Raman effect

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