Pressure-dependent structural and electronic properties of quasi-one-dimensional (TMTTF)2PF6

Pressure-dependent structural and electronic properties of quasi-one-dimensional (TMTTF)2PF6
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准一维 (TMTTF)2PF6 的压力相关结构和电子特性

DOI:
10.1088/0953-8984/25/1/014006
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发表时间:
2013
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
通讯作者:
M. Dressel
M. Dressel
中科院分区:
--
文献类型:
--
作者:
E. Rose;C. Loose;J. Kortus;A. Pashkin;C.A. Kuntscher;S G Ebbinghaus;M Hanfland;F Lissner;Th Schleid;M. Dressel

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我们已经进行了详细的X射线调查的准一维有机导体(TMTTF)2 PF 6在室温和流体静压力高达27千巴。基于压相关晶体结构,采用密度泛函理论计算了电子能带结构。我们的系统研究提供了重要的信息,有机分子之间的耦合,而且对阴离子。我们讨论的电子性质的后果,并比较它们与压力下的光学调查。垂直于堆叠观察到的等离子体频率的增加对应于b方向的频带的加宽。在20 kbar左右,从一维Mott绝缘体到二维金属发生了维度交叉。
We have performed detailed x-ray investigations of the quasi-one-dimensional organic conductor (TMTTF) 2 PF 6 at room temperature and hydrostatic pressures up to 27 kbar. Based on the pressure-dependent crystal structure, the electronic band structure was calculated by density functional theory (DFT). Our systematic study provides important information on the coupling among the organic molecules but also to the anions. We discuss the consequences for the electronic properties and compare them with optical investigations under pressure. The increasing plasma frequency observed perpendicular to the stacks corresponds to a widening of the bands for the b-direction. Around 20 kbar a dimensional crossover occurs from a one-dimensional Mott insulator to a two-dimensional metal.
DOI: 10.1016/0378-4363(86)90170-1
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影响因子: 2.8
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