Quantitative regulation of electron-phonon coupling

Pei, Shenghai; Zhang, Zejuan; Jiao, Chenyin; Wang, Zhenyu; Lv, Jian; Zhang, Yujun; Huang, Mingyuan; Wang, Yanchao; Wang, Zenghui; Xia, Juan

2024-07-01

10.1088/1361-6633/ad4fbd

REPORTS ON PROGRESS IN PHYSICS   影响因子和分区

0034-4885

1361-6633

Electron-phonon (e-p) coupling plays a crucial role in various physical phenomena, and regulation of e-p coupling is vital for the exploration and design of high-performance materials. However, the current research on this topic lacks accurate quantification, hindering further understanding of the underlying physical processes and its applications. In this work, we demonstrate quantitative regulation of e-p coupling, by pressure engineering and in-situ spectroscopy. We successfully observe both a distinct vibrational mode and a strong Stokes shift in layered CrBr3, which are clear signatures of e-p coupling. This allows us to achieve precise quantification of the Huang-Rhys factor S at the actual sample temperature, thus accurately determining the e-p coupling strength. We further reveal that pressure efficiently regulates the e-p coupling in CrBr3, evidenced by a remarkable 40% increase in S value. Our results offer an approach for quantifying and modulating e-p coupling, which can be leveraged for exploring and designing functional materials with targeted e-p coupling strengths.

electron-phonon coupling two-dimensional systems pressure technique spectroscopy quantitative regulation

SCI

英语

其他

National Natural Science Foundation of China["T2325007","62250073","U21A20459","62104029","62004026","62150052","12374005","12174142","T2225013"] ; Department of Science and Technology of Sichuan Province["2021JDTD0028","2023NSFSC1334"]

Physics

Physics, Multidisciplinary

WOS:001261087800001

IOP Publishing Ltd

PHYSICS

Web of Science

1.Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China
2.Jilin Univ, Coll Phys, Int Ctr Future Sci, Changchun 130012, Peoples R China
3.Jilin Univ, Coll Phys, Int Ctr Computat Method & Software, Changchun 130012, Peoples R China
4.Yunnan Univ, Sch Phys & Astron, Kunming 650091, Peoples R China
5.Yunnan Univ, Key Lab Quantum Informat Yunnan Prov, Kunming 650091, Peoples R China
6.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China

Pei, Shenghai,Zhang, Zejuan,Jiao, Chenyin,et al. Quantitative regulation of electron-phonon coupling[J]. REPORTS ON PROGRESS IN PHYSICS,2024,87(7).

Pei, Shenghai.,Zhang, Zejuan.,Jiao, Chenyin.,Wang, Zhenyu.,Lv, Jian.,...&Xia, Juan.(2024).Quantitative regulation of electron-phonon coupling.REPORTS ON PROGRESS IN PHYSICS,87(7).

Pei, Shenghai,et al."Quantitative regulation of electron-phonon coupling".REPORTS ON PROGRESS IN PHYSICS 87.7(2024).