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.
Anomalous dispersion of optical phonons at the neutral-ionic transition: Evidence from diffuse X-ray scattering / D'Avino, Gabriele; Girlando, Alberto; Painelli, Anna; M. H., Lemée Cailleau; Z. G., Soos. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 99:(2007), pp. 156407/1-156407/4. [10.1103/PhysRevLett.99.156407]
Anomalous dispersion of optical phonons at the neutral-ionic transition: Evidence from diffuse X-ray scattering
D'AVINO, Gabriele;GIRLANDO, Alberto;PAINELLI, Anna;
2007-01-01
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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
