Charge-ordering transition in (TMTTF)2X explored via dilatometry
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Charge-ordering phenomena have been highly topical over the past few years. A phase transition towards a charge-ordered state has been observed experimentally in several classes of materials. Among them, many studies have been devoted to the family of quasi-one-dimensional organic charge-transfer salts (TMTTF)2X, where (TMTTF) stands for tetramethyltetrathiafulvalene and X for a monovalent anion (X = PF6, AsF6 and SbF6). However, the relationship between the electron localization phenomena and the role of the lattice distortion in stabilizing the charge-ordering pattern is poorly documented in the literature. Here we present a brief overview of selected literature results, with emphasis placed on recent thermal expansion experiments probing the charge-ordering transition of these salts. © 2013 IOP Publishing Ltd.
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Charge ordered state, Charge-ordering transitions, Charge-transfer salts, Electron localizations, Lattice distortions, Monovalent anions, Quasi-one-dimensional, Tetramethyltetrathiafulvalene, Thermal expansion, Salts
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Journal of Physics Condensed Matter, v. 25, n. 34, 2013.
