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arXiv · 2204.12528

Phonon-phonon interactions in the polarizarion dependence of Raman scattering

Nimrod Benshalom·Maor Asher·Rémy Jouclas·Roman Korobko·Guillaume Schweicher·Jie Liu·Yves Geerts·Olle Hellman·Omer Yaffe
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Abstract

We have found that the polarization dependence of Raman scattering in organic crystals at finite temperatures can only be described by a fourth-rank formalism. This generalization of the second-rank Raman tensor $\mathcal{R}$ 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.

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Nimrod Benshalom, Maor Asher, Rémy Jouclas, Roman Korobko, Guillaume Schweicher, Jie Liu, Yves Geerts, Olle Hellman, Omer Yaffe. 2022-04-26. Phonon-phonon interactions in the polarizarion dependence of Raman scattering. https://arxiv.org/abs/2204.12528

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