Simultaneous capturing phonon and electron dynamics in MXenes

Zhang, Qi1,2; Li, Jiebo3,5,6,8; Wen, Jiao4; Li, Wei5; Chen, Xin5; Zhang, Yifan3; Sun, Jingyong4; Yan, Xin6; Hu, Mingjun4; Wu, Guorong1,2; Yuan, Kaijun1,2,5,6,7,8; Guo, Hongbo4,5,6,8; Yang, Xueming1,2,7,8

2022-12-22

10.1038/s41467-022-35605-7

NATURE COMMUNICATIONS   影响因子和分区

2041-1723

Plasmonic MXenes are of particular interest, because of their unique electron and phonon structures and multiple surface plasmon effects, which are different from traditional plasmonic materials. However, to date, how electronic energy damp to lattice vibrations (phonons) in MXenes has not been unraveled. Here, we employed ultrafast broadband impulsive vibrational spectroscopy to identify the energy damping channels in MXenes (Ti3C2Tx and Mo2CTx). Distinctive from the well-known damping pathways, our results demonstrate a different energy damping channel, in which the Ti3C2Tx plasmonic electron energy transfers to coherent phonons by nonthermal electron mediation after Landau damping, without involving electron-electron scattering. Moreover, electrons are observed to strongly couple with A(1g) mode (similar to 60fs, 85-100%) and weakly couple with E-g mode (1-2ps, 0-15%). Our results provide new insight into the electron-phonon interaction in MXenes, which allows the design of materials enabling efficient manipulation of electron transport and energy conversion.

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英语

NI论文

通讯

National Natural Science Foundation of China["22073003","21922306","21873099","21803006"] ; Chemical Dynamics Research Center[22288201] ; Key Technology Team of the Chinese Academy of Science[GJJSTD20220001] ; Innovation Program for Quantum Science and Technology[2021ZD0303304] ; Liaoning Revitalization Talents Program[XLYC1907154]

Science & Technology - Other Topics

Multidisciplinary Sciences

WOS:000972743600029

NATURE PORTFOLIO

Web of Science

1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, 457 Zhongshan Rd, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Coherent Light Source, 457 Zhongshan Rd, Dalian 116023, Peoples R China
3.Beihang Univ, Beijing Adv Innovat Ctr Biomed Engn, Inst Med Photon, Sch Biol Sci & Med Engn, Beijing 100191, Peoples R China
4.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
5.GuSu Lab Mat, Suzhou 215123, Jiangsu, Peoples R China
6.Beihang Univ, Sch Mech Engn & Automat, Beijing 100191, Peoples R China
7.Hefei Natl Lab, Hefei 230088, Peoples R China
8.Southern Univ Sci & Technol, Dept Chem, Coll Sci, Shenzhen 518055, Peoples R China

Zhang, Qi,Li, Jiebo,Wen, Jiao,et al. Simultaneous capturing phonon and electron dynamics in MXenes[J]. NATURE COMMUNICATIONS,2022,13(1).

Zhang, Qi.,Li, Jiebo.,Wen, Jiao.,Li, Wei.,Chen, Xin.,...&Yang, Xueming.(2022).Simultaneous capturing phonon and electron dynamics in MXenes.NATURE COMMUNICATIONS,13(1).

Zhang, Qi,et al."Simultaneous capturing phonon and electron dynamics in MXenes".NATURE COMMUNICATIONS 13.1(2022).