Relaxation dynamics of magic clusters
Relaxation dynamics of magic clusters
复制标题
魔法簇的弛豫动力学
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. Ganteför
中科院分区：
文献类型：
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作者：
Y. D. Kim;M. Niemietz;Peter Gerhardt;F. Gynz;G. Ganteför
Using femtosecond time-resolved two-photon photoemission spectroscopy, relaxation rates of the optically excited states in Al13 ,S i4 , and Au6 clusters are estimated to be 250 fs, 1.2 ps, and about 1 ns, respectively. These clusters show closed electronic shell structures and large gaps between the highest occupied molecular orbital and the lowest unoccupied molecular orbital in the anionic sAl 13 d or neutral (Si4 and Au6) states. Thus the different behaviors of these clusters for the relaxation dynamics cannot be rationalized within a relaxation mechanism dominated by Auger-like electron-electron coupling. We suggest that for these small clusters, the major decay mechanism might be electron-phonon coupling.
