物理
联轴节(管道)
声子
电子
凝聚态物理
核物理学
机械工程
工程类
作者
Shenghai Pei,Zejuan Zhang,Chenyin Jiao,Zhenyu Wang,Jian Lv,Yujun Zhang,Mingyuan Huang,Yanchao Wang,Zenghui Wang,Juan Xia
标识
DOI:10.1088/1361-6633/ad4fbd
摘要
Abstract 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 CrBr 3 , 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 CrBr 3 , 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.
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