Résumé

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.

Information

Item Type:	Journal
Divisions:	» Laboratoire des Ecosystèmes Aquatiques et Terrestres » Faculté des Sciences et de la Technologie
ePrint ID:	211
Date Deposited:	2014-12-14
Further Information:	Google Scholar
URI:	https://www.univ-soukahras.dz/fr/publication/article/211

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