文献类型：期刊文献

英文题名：Time-resolved tracking of hot carrier relaxation in two types of MBenes

作者：Zhao, Jie[1,2];Zhang, Qi[1];Xiong, Pan[2];Wang, Chunli[3];Zhang, Liangzhu[3];Li, Jiebo[4];Zhao, Kun[1];Lu, Ruifeng[1];Yuan, Kaijun[2,5,6];Yang, Xueming[2,5,7,8]

机构：[1]Nanjing Univ Sci & Technol, Dept Appl Phys, Nanjing 210094, Peoples R China;[2]Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Chem React Dynam, Dalian 116023, Peoples R China;[3]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[4]Beihang Univ, Inst Med Photon, Beijing Adv Innovat Ctr Biomed Engn, Sch Biol Sci & Med Engn, Beijing 100191, Peoples R China;[5]Hefei Natl Lab, Hefei 230026, Peoples R China;[6]Univ Chinese Acad Sci, Beijing 101408, Peoples R China;[7]Southern Univ Sci & Technol, Coll Sci, Dept Chem, Shenzhen 518055, Peoples R China;[8]Southern Univ Sci & Technol, Coll Sci, Ctr Adv Light Source Res, Shenzhen 518055, Peoples R China

年份：2026

外文期刊名：CHEMICAL SCIENCE

收录：;EI(收录号：20261420404859);WOS:【SCI-EXPANDED(收录号:WOS:001729183500001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant No. 22303107, 22241304, 22225303, 22173082, 22209176, 22579053, 92365105, 12204237), the National Natural Science Foundation of China (NSFC Center for Chemical Dynamics (Grant No. 22288201)), the Innovation Program for Quantum Science and Technology (2021ZD0303304), the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB0970000 and XDB0970200), the Fundamental Research Funds for the Central Universities, (No. 30925010211), the Open Foundation of the State Key Laboratory of Molecular Reaction Dynamics in DICP (Grant No. SKLMRD-K202507), Shanghai Pujiang Talent plan project (23PJ1402000), Liaoning Natural Science Foundation (2023-BS-007), Beijing National Laboratory for Condensed Matter Physics (2024BNLCMPKF017), Jincheng Research institute of opto-mechatronics industry (2024SZKF08), the Natural Science Foundation of Jiangsu Province (Grant No. BK20220922).

语种：英文

外文关键词：Hot electrons - Relaxation time

摘要：In metallic low-dimensional materials, the interaction between non-equilibrium electrons and phonons underlies various physical phenomena, such as the relaxation process of hot carriers. However, it is unclear how the surface, with or without termination, controls electron-phonon (e-p) interactions in two-dimensional (2D) transition metal borides (MBenes). Herein, ultrafast time-resolved spectroscopy was employed to measure the e-p interaction rate, revealing that MoB MBene without termination exhibits a lower rate than Mo4/3B2-xTz MBene with termination, indicating that its e-p interactions are weakened. Raman spectra and computational calculations indicate that the suppression is attributed to the fact that the excited electrons can only couple with a limited number of vibrational modes. This study paves the way for the tailored manipulation of hot carrier relaxation time, offering opportunities for advanced applications in electronics, optoelectronics, catalysis, and more.