Characterization of the anion-ordering transition in (TMTTF)2ReO4 by x-ray absorption and photoemission spectroscopies

G. Subías; Tahar ABBAZ; J. M. Fabre; J. Fraxedas

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Characterization of the anion-ordering transition in (TMTTF)2ReO4 by x-ray absorption and photoemission spectroscopies

https://www.univ-soukahras.dz/en/publication/article/211

G. Subías, Tahar ABBAZ, J. M. Fabre and J. Fraxedas (2007) Characterization of the anion-ordering transition in (TMTTF)2ReO4 by x-ray absorption and photoemission spectroscopies. Physical Review B , 76(8), 085103

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We have characterized the electronic structure of single crystals of the organic quasione-dimensional salt (TMTTF)2ReO4 (TMTTF=tetramethyl-tetrathiafulvalene) by x-ray-absorption near-edge spectroscopy and x-ray photoemission spectroscopy using synchrotron radiation under low-intensity conditions (single-bunch ring operation mode) in order to strongly reduce detrimental beam-induced damage. The observed differences in spectra taken at T=116K and T=207K are ascribed to the anion-ordering transition, which takes place at 155K. It is proposed that the ordering transition driven by the anions perturbs the structural organization of the organic stacks, increasing the overlap of the π-type orbitals through dimerization.

Item Type:	Journal
Divisions:	» Laboratory for Terrestrial and Aquatic Ecosystems » Faculty of Science and Technology
ePrint ID:	211
Date Deposited:	2014-12-14
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/en/publication/article/211