arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv physics/9903041physics.atm-clus
收藏

小银团簇的光学响应

Optical response of small silver clusters

K. Yabana, G. F. Bertsch

摘要:

用含时局域密度近似方法计算了Ag ~(2+)、Ag ~(3+)、Ag ~(8+)和Ag ~(9+)的光学响应。计算包括了封闭壳层Ag^{+11}离子核之外的所有电子,因此第一次在响应中明确地包括了填充的d-壳层。强表面等离子体激元的激发能在4 eV附近,与实验结果吻合较好。由于d电子的存在,理论跃迁强度比Ag_8中的纯s电子和规则猝灭了4倍。强度的可比量在于低于6 eV激发的复杂状态。总低于6 eV,约50%的s总和规则,是与已发表的实验一致。

英文摘要:

The time-dependent local density approximation is applied to the optical response of the silver clusters, Ag_2, Ag_3, Ag_8 and Ag_9^+. The calculation includes all the electrons beyond the closed-shell Ag^{+11} ionic core, thus including for the first time explicitly the filled d-shell in the response. The excitation energy of the strong surface plasmon near 4 eV agrees well with experiment. The theoretical transition strength is quenched by a factor of 4 with respect to the pure s-electron sum rule in Ag_8 due to the d-electrons. A comparable amount of strength lies in complex states below 6 eV excitation. The total below 6 eV, about 50% of the s sum rule, is consistent with published experiments.

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。

↑