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 andin-situspectroscopy. 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 factorSat 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 inSvalue. 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.
摘要：
电子-声子（e-p）耦合在各种物理现象中起着至关重要的作用，e-p耦合的调控对于高性能材料的探索和设计至关重要。然而,目前对这一主题的研究缺乏准确的量化，阻碍了对底层物理过程及其应用的进一步理解。在这项工作中,我们证明了e-p偶联的定量调控，通过压力工程和局部显微镜检查。我们成功地观察到分层CrBr3中独特的振动模式和强烈的斯托克斯位移，这是e-p耦合的明显特征。这使我们能够在实际样品温度下实现对Huang-Rhys因子的精确量化，从而准确地确定e-p耦合强度。我们进一步揭示了压力有效地调节CrBr3中的e-p耦合，S值显着增加了40％。我们的结果提供了一种量化和调节e-p耦合的方法，可用于探索和设计具有目标e-p耦合强度的功能材料。
