Instituto de Geociências e Ciências Exatas-IGCE, Unesp-Univ Estadual Paulista, Departamento de Física, Caixa Postal 178, 13506-900 Rio Claro (SP), Brazil.
J Phys Condens Matter. 2013 Aug 28;25(34):343201. doi: 10.1088/0953-8984/25/34/343201. Epub 2013 Jul 29.
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.
电荷有序现象在过去几年中备受关注。在几类材料中已经观察到向电荷有序态的相变。其中，许多研究都集中在准一维有机电荷转移盐（TMTTF）2X 家族上，其中（TMTTF）代表四甲基四硫富瓦烯，X 代表一价阴离子（X=PF6、AsF6 和 SbF6）。然而，电子局域化现象与晶格畸变在稳定电荷有序模式中的作用之间的关系在文献中记录甚少。在这里，我们简要概述了一些选定的文献结果，重点介绍了最近探测这些盐的电荷有序转变的热膨胀实验。
