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Phonon–Phonon Interactions in the Polarization Dependence of Raman Scattering

par Benshalom, Nimrod;Asher, Maor;Jouclas, Remy ;Korobko, Roman;Schweicher, Guillaume ;Liu, Jie ;Geerts, Yves ;Hellman, Olle;Yaffe, Omer
Référence The Journal of Physical Chemistry Part C: Nanomaterials and Interfaces, 127, 36, page (18099-18106)
Publication Publié, 2023-08-31

Article révisé par les pairs

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Résumé :

We have found that the polarization dependence of Raman scattering in organic crystals at finite temperatures can only be described by a fourth-rank tensor formalism. This generalization of the second-rank Raman tensor ℛ stems from the effect of off-diagonal components in the crystal self-energy on the light scattering mechanism. We thus establish a novel manifestation of phonon–phonon interaction in inelastic light scattering, markedly separate from the better-known phonon lifetime.