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Probing the electron-phonon interaction in correlated systems with coherent lattice fluctuation spectroscopy

机译:用相干晶格涨落光谱研究相关系统中的电子-声子相互作用

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摘要

Tailoring the properties of correlated oxides is accomplished by chemical doping, pressure, temperature, or magnetic field. Photoexcitation is a valid alternative to reach out-of-equilibrium states otherwise inaccessible. Here, we quantitatively estimate the coupling between a lattice distortion and the charge-transfer excitation in La_2CuO_(4+δ). We photoinduce a coherent La ion vibration and monitor the response of the optical constants in a broad energy range, providing quantitative information on the electron-phonon matrix element that can be compared to theoretical models. We propose the same methodology to probe electron-phonon and electron-electron interactions in other materials.
机译:通过化学掺杂,压力,温度或磁场来定制相关氧化物的性质。光激发是达到平衡状态的有效选择,否则将无法达到。在这里,我们定量估计La_2CuO_(4 +δ)中晶格畸变与电荷转移激发之间的耦合。我们光诱导相干的La离子振动,并在较宽的能量范围内监测光学常数的响应,从而提供可与理论模型进行比较的电子声子矩阵元素的定量信息。我们提出了相同的方法来探测其他材料中的电子-声子和电子-电子相互作用。

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  • 来源
    《Physical review》 |2015年第3期|035147.1-035147.8|共8页
  • 作者单位

    Laboratory for Ultrafast Microscopy and Electron Scattering, ICMP, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

    Laboratory for Ultrafast Microscopy and Electron Scattering, ICMP, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland,Laboratory of Ultrafast Spectroscopy, ISIC, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

    Institute for Complex Systems - Consiglio Nazionale delle Ricerche, and Physics Department, University of Rome La Sapienza, Ⅰ-00185 Rome, Italy;

    Solid State Chem. Group, Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland;

    Solid State Chem. Group, Laboratory for Developments and Methods, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland;

    Laboratory of Ultrafast Spectroscopy, ISIC, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

    Laboratory of Ultrafast Spectroscopy, ISIC, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

    Institute for Complex Systems - Consiglio Nazionale delle Ricerche, and Physics Department, University of Rome La Sapienza, Ⅰ-00185 Rome, Italy;

    Laboratory for Ultrafast Microscopy and Electron Scattering, ICMP, Ecole Polytechnique Federate de Lausanne, CH-1015 Lausanne, Switzerland;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    phonons;

    机译:声子;

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