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arXiv 2004.14044cond-mat.mes-hall
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分子薄膜能带结构中的原子晶体特征

Signatures of an Atomic Crystal in the Band Structure of a Molecular Thin Film

Norman Haag, Daniel Lüftner, Johannes Seidel, Leah L. Kelly, Giovanni Zamborlini, Matteo Jugovac, Vitaliy Feyer, Martin Aeschlimann, Peter Puschnig, Mirko Cinch… 展开作者

Norman Haag, Daniel Lüftner, Johannes Seidel, Leah L. Kelly, Giovanni Zamborlini, Matteo Jugovac, Vitaliy Feyer, Martin Aeschlimann, Peter Puschnig, Mirko Cinchetti, Benjamin Stadtmüller

摘要:

分子材料中的输运现象与价态的轨道特性和定域化程度有着内在的联系。在这里,我们结合角度分辨光电发射与光电发射断层扫描,以确定所有的分子态的空间分布的价带结构的C $_{60}$薄膜。虽然两个最前沿的价态表现出很强的能带色散,在较大的结合能的状态的特征在于不同的发射模式在能量和动量空间。我们的研究结果表明,形成一个原子晶体状的能带结构的分子固体与离域的$π$样价态和强烈本地化的$σ$ -状态在较大的结合能。

英文摘要:

Transport phenomena in molecular materials are intrinsically linked to the orbital character and the degree of localization of the valence states. Here, we combine angle-resolved photoemission with photoemission tomography to determine the spatial distribution of all molecular states of the valence band structure of a C$_{60}$ thin film. While the two most frontier valence states exhibit a strong band dispersion, the states at larger binding energies are characterized by distinct emission patterns in energy and momentum space. Our findings demonstrate the formation of an atomic crystal-like band structure in a molecular solid with delocalized $π$-like valence states and strongly localized $σ$-states at larger binding energies.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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