Core hole-electron correlation in coherently coupled molecules.
Core hole-electron correlation in coherently coupled molecules.
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DOI：
10.1103/physrevlett.111.048102
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发表时间：
2013-02
影响因子：
8.6
通讯作者：
M. Scholz;F. Holch;C. Sauer;M. Wiessner;A. Scholl;F. Reinert
中科院分区：
文献类型：
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作者：
M. Scholz;F. Holch;C. Sauer;M. Wiessner;A. Scholl;F. Reinert
利用能量色散近边x射线吸收精细结构谱研究了相干耦合分子中的空穴-电子关联。在过渡阶段，1，4，5，8-萘四甲酸-二酐多层膜在C-K边的X射线吸收信号相对于体相和气相光谱的线形和能量位置发生了特殊的变化。通过比较过渡偶极子，这是建立光学吸收耦合的基础上的理论模型，我们证明了所观察到的光谱差异可以解释由分子间离域的核心空穴-电子对。通过应用这个模型，我们可以进一步量化离域芯激子的相干长度。
We study the core hole-electron correlation in coherently coupled molecules by energy dispersive near edge x-ray absorption fine-structure spectroscopy. In a transient phase, which exists during the transition between two bulk arrangements, 1,4,5,8-naphthalene-tetracarboxylicacid-dianhydride multilayer films exhibit peculiar changes of the line shape and energy position of the x-ray absorption signal at the C K-edge with respect to the bulk and gas phase spectra. By a comparison to a theoretical model based on a coupling of transition dipoles, which is established for optical absorption, we demonstrate that the observed spectroscopic differences can be explained by an intermolecular delocalized core hole-electron pair. By applying this model we can furthermore quantify the coherence length of the delocalized core exciton.