Electron-phonon coupling (EPC) is foundational in condensed matter physics, determining intriguing phenomena and properties in both conventional and quantum materials. In this manuscript, we propose and demonstrate a novel two dimensional (2D) EPC spectroscopy which allows for direct extraction of EPC matrix elements for specific phonon modes and different electron energies, simultaneously. Using this technique, we are able to measure the electron-energy dependence of the EPC strength for individual phonon modes. This capability allows us to identify unique signatures distinguishing nonlocal Su-SchriefferHeeger (SSH)-type couplings from local Holstein-type couplings. In application to a methylammonium lead iodide (MAPI) perovskite, we find that two pronounced phonon modes at room temperature exhibit highly distinctive EPC behaviors, concerning strength, anisotropy, and temperature-dependence across the structural phase transition. Our approach paves the way for unraveling the microscopic origin of EPC, the change of the phonon-mode-specific EPC with external conditions, and phonon-mediated ultrafast control of condensed materials.
Modeling Nonlocal Electron-Phonon Coupling in Organic Crystals Using Interpolative Maps: The Spectroscopy of Crystalline Pentacene and 7,8,15,16-Tetraazaterrylene
Suppression of atomic displacive excitation in photo-induced A$_{\mathrm{1g}}$ phonon mode of bismuth unveiled by low-temperature time-resolved x-ray diffraction
Photogeneration and signatures of coherent phonons in time-resolved photoemission spectroscopy: First-principles time-dependent adiabatic GW approach
Institute of Atomic and Molecular Sciences, Academia Sinica（原子分子科学研究所，中央研究院）；Physics Division, National Center of Theoretical Sciences（理论科学中心物理部）；Mork Family Department of Chemical Engineering and Materials Science, University of Southern California（南加州大学莫克家族化学工程与材料科学系）；Department of Physics, University of California at Berkeley（加州大学伯克利分校物理系）；Materials Sciences Division, Lawrence Berkeley National Laboratory（劳伦斯伯克利国家实验室材料科学部）
Angle-Resolved Cryogenic Brillouin-Mandelstam Spectroscopy of Surface and Bulk Acoustic Phonons in Diamond
University of California, Los Angeles（加州大学洛杉矶分校）；California NanoSystems Institute, University of California, Los Angeles（加州纳米系统研究所）；Auburn University（奥本大学）；Center for Quantum Science and Engineering, University of California, Los Angeles（量子科学与工程中心）
Dynamical theory of angle-resolved electron energy loss and gain spectroscopies of phonons and magnons in transmission electron microscopy including multiple scattering effects
Time-resolved Photo-Phonon Spectroscopy of Exchange Coupled ${Cr^{3+}}$ - Pairs in Ruby
用一种相当简单的方法，在2K温度下，同时测量了红宝石0，03 at ${%}$和0，16 at ${%}$的光吸收谱和激发态无辐射跃迁。该技术利用时间分辨的辐射热计检测声子，产生的激发态非辐射弛豫光激发与脉冲可调谐染料激光器。所观察到的声子激发光谱与已知的单个铬离子和最近邻离子对的吸收光谱相吻合。首次直接观察到单个铬离子与四近邻离子的快速（$\leqslant 0,5 μs$）共振能量转移。观察到新的强扰动$Cr$ -单离子位。
Attosecond-resolved coherent control of zone-folded acoustic phonons in silicon carbide
Tokyo Institute of Technology（东京工业大学）；Osaka Metropolitan University（大阪公立大学）；Southwest University of Science and Technology（西南科技大学）；China Academy of Engineering Physics（中国工程物理研究院）；Institute of Science Tokyo（东京科学大学）；Shibaura Institute of Technology（芝浦工业大学）
Istituto Italiano di Tecnologia（意大利理工大学）；University of Southern Denmark（南丹麦大学）；Fritz Haber Institute of the Max Planck Society（马克斯·普朗克学会弗里茨·哈伯研究所）；Consiglio Nazionale delle Ricerche (CNR)（意大利国家研究委员会）
Critical behavior of the damping rate of GHz acoustic phonons in SrTiO3 at the antiferrodistortive phase transition measured by time- and frequency-resolved Brillouin scattering
Ultrafast lattice dynamics and electron-phonon coupling in platinum extracted with a global fitting approach for time-resolved polycrystalline diffraction data
Phonon selection and interference in momentum-resolved electron energy loss spectroscopy
Center for Nanophase Materials Sciences, Oak Ridge National Laboratory（橡树岭国家实验室纳米材料科学中心）；Department of Mechanical and Aerospace Engineering, University of Virginia（弗吉尼亚大学机械与航空航天工程系）；Interdisciplinary Materials Science Program, Vanderbilt University（范德堡大学跨学科材料科学项目）；Department of Mechanical Engineering, University of Maryland（马里兰大学机械工程系的）；Department of Physics and Astronomy, Vanderbilt University（范德堡大学物理与天文学系）；Department of Physics, University of Virginia（弗吉尼亚大学物理系）；Department of Materials Science and Engineering, University of Virginia（弗吉尼亚大学材料科学与工程系）
First-principles study on the electrical resistivity in zirconium dichalcogenides with multi-valley bands: mode-resolved analysis of electron-phonon scattering
Time-Resolved Photoemission Spectroscopy of Quantum Materials Using High Harmonic Generation: Probing Electron-Phonon Interactions and Non-Equilibrium Dynamics
Institute for Solid State Physics, The University of Tokyo（东京大学固体物理研究所）；Trans-scale Quantum Science Institute, The University of Tokyo（东京大学跨尺度量子科学研究所）；Material Innovation Research Center, The University of Tokyo（东京大学材料创新中心）
Sublattice-resolved coherent phonon dynamics in charge density waves
Massachusetts Institute of Technology（麻省理工学院）；Pohang Accelerator Laboratory（浦项加速器实验室）；Beijing Academy of Quantum Information Sciences（北京量子信息科学研究院）；International Center for Quantum Materials, School of Physics, Peking University（北京大学物理学院量子材料国际中心）；Pohang University of Science and Technology（浦项科技大学）
Temperature evolution of quasiparticle dispersion dynamics in semimetallic 1T-TiTe2 via high-resolution angle-resolved photoemission spectroscopy and ultrafast optical pump-probe spectroscopy
Coherent excitations and electron phonon coupling in Ba/EuFe_2As_2 compounds investigated by femtosecond time- and angle-resolved photoemission spectroscopy
Measurement of an Exceptionally Weak Electron-Phonon Coupling on the Surface of the Topological Insulator Bi$_2$Se$_3$ Using Angle-Resolved Photoemission Spectroscopy
拓扑绝缘体上的无带隙表面态可以避免非磁性杂质的弹性散射，这使得它们成为低功率电子应用的有希望的候选者。然而，对于广泛的应用，这些状态应该在环境温度下保持相干。本文利用高分辨角分辨光电子能谱研究了模型拓扑绝缘体Bi $_2$ Se $_3$表面的电子结构和散射率随温度的变化。我们发现拓扑表面态随着温度的变化而出现极弱的增宽，并且态的色散没有异常，这表明电子-声子耦合异常弱。我们的研究结果表明，拓扑表面态不仅受到保护，从杂质的弹性散射，但也从低能量声子散射，这表明拓扑绝缘体可以作为室温电子器件的基础。
