Evolution of ferroelectricity in tetrathiafulvalene-p-chloranil as a function of pressure and temperature.
Evolution of ferroelectricity in tetrathiafulvalene-p-chloranil as a function of pressure and temperature.
复制标题
四硫富瓦烯-对四氯苯醌中铁电性随压力和温度的变化。
DOI：
10.1063/1.4884964
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
M. Dressel
中科院分区：
文献类型：
--
作者：
A. Dengl;R. Beyer;T. Peterseim;T. Ivek;G. Untereiner;M. Dressel
本文用压变红外光谱研究了四硫富瓦烯-对四氯苯醌（TTF-CA）混合堆电荷转移络合物的中性-离子相变。通过追踪CA分子的C=O反对称伸缩模式，准确确定了TTF-CA在压力-温度相图中的离子性。在任何时候，TTF-CA晶体仅具有单一离子性;没有共存区域或外来高压相。我们的研究结果揭示了新的光的作用，电子-声子相互作用的中性离子的转变。
The neutral-to-ionic phase transition in the mixed-stack charge-transfer complex tetrathiafulvalene-p-chloranil (TTF-CA) has been studied by pressure-dependent infrared spectroscopy up to p = 11 kbar and down to low temperatures, T = 10 K. By tracking the C=O antisymmetric stretching mode of CA molecules, we accurately determine the ionicity of TTF-CA in the pressure-temperature phase diagram. At any point, the TTF-CA crystal bears only a single ionicity; there is no coexistence region or an exotic high-pressure phase. Our findings shed new light on the role of electron-phonon interaction in the neutral-ionic transition.
影响因子：
3.7
作者：
Sedlmeier, Katrin;Elsaesser, Sebastian;Dressel, Martin
通讯作者：
Dressel, Martin