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American Physical Society, Physical Review Letters, 15(99), 2007

DOI: 10.1103/physrevlett.99.156407

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Anomalous dispersion of optical phonons at the neutral-ionic transition: Evidence from diffuse X-ray scattering

Journal article published in 2007 by Gabriele D'Avino, Alberto Girlando, Anna Painelli ORCID, Marie-Hélène Lemée-Cailleau, Zoltán G. Soos
This paper is available in a repository.
This paper is available in a repository.

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Abstract

Diffuse X-ray data for mixed stack organic charge-transfer crystals approaching the neutral-ionic phase transition can be quantitatively explained as due to the softening of the optical phonon branch. The interpretation is fully consistent with vibrational spectra, and underlines the importance of electron-phonon coupling in low-dimensional systems with delocalized electrons. ; Comment: 4 pages, 4 figures