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

Article

关键词: RAMAN-SCATTERING;    QUASI-PARTICLES;    SPECTRAL WEIGHT;    LIGHT-PULSES;    TRANSITION;    SUPERCONDUCTIVITY;    EXCITATION;    DYNAMICS;    LA2CUO4;    CUPRATE;   

DOI  :  10.1103/PhysRevB.92.035147

来源: SCIE

【 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 La2CuO4+delta. 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.

【 授权许可】

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