Photo-induced plasmon-phonon coupling in PbTe

M. P. Jiang,M. Trigo,S. Fahy, A. Hauber,É. D. Murray,I Savić, C. Bray,J. N. Clark,T. Henighan, M. Kozina,M. Chollet,J. M. Glownia,M. C. Hoffmann,D. Zhu, O. Delaire,A. F. May,B. C. Sales,A. M. Lindenberg,P. Zalden,T. Sato,R. Merlin,D. A. Reis

arxiv（2021）

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摘要

We report the observation of photo-induced plasmon-phonon coupled modes in the group IV-VI semiconductor PbTe using Fourier-transform inelastic X-ray scattering at the Linac Coherent Light Source (LCLS). We measure the near-zone-center dispersion of the heavily screened longitudinal optical (LO) phonon branch as extracted from differential changes in x-ray diffuse scattering intensity following above band gap photoexcitation.

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关键词

pbte,photo-induced,plasmon-phonon

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