Collective plasmon excitations in C60 clusters.
Collective plasmon excitations in C60 clusters.
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DOI：
10.1103/physrevlett.67.2690
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发表时间：
1991-11
影响因子：
8.6
通讯作者：
G. Bertsch;A. Bulgac;D. Tománek;Yang Wang
中科院分区：
文献类型：
--
作者：
G. Bertsch;A. Bulgac;D. Tománek;Yang Wang
用线性响应理论计算了C60团簇的电磁响应函数。我们发现，价电子是相当离域和集体激发。在激发光谱的低能部分，最低允许的hω = 3eV的跃迁被强烈屏蔽，而低于6eV的跃迁被适度屏蔽，这与实验结果一致。我们还预测了一个巨大的集体共振，在一个不寻常的高能量为120 eV
The electromagnetic response function of a C 60 cluster is calculated using linear-response theory. We find that the valence electrons are quite delocalized and show collective excitations. In the low-energy part of the excitation spectrum, the lowest allowed transition at hω≃3 eV is strongly screened, and the other transitions below 6 eV are moderately screened, in agreement with experiment. We also predict a giant collective resonance at an unusually high energy of ≃20 eV