Na_8单偶极和双偶极等离子体激发的组态相互作用研究
Configuration interaction study of single and double dipole plasmon excitations in Na_8
摘要：
本文在Jeltron模型下对Na_8金属团簇的基态和激发态进行了微观分析。我们进行了一系列的配置相互作用的Hartree-Fock基础上的计算和构造本征态的哈密顿量进行4粒子4空穴组件。基于对偶极跃迁强度的分析，我们选出了那些可以解释为集体偶极等离子体激元及其双激发的状态。这些模式被发现具有高度的谐波性，从谐波极限的偏差剩余，但是，10%的顺序。
英文摘要：
We carry out a microscopic analysis of the ground and excited states of the Na_8 metal cluster within the jellium model. We perform a series of configuration interaction calculations on a Hartree-Fock basis and construct eigenstates of the Hamiltonian which carry up to 4-particle 4-hole components. Based on the analysis of the dipole transition strengths, we single out those states which can be interpreted as the collective dipole plasmon and its double excitations. These modes are found to possess a high degree of harmonicity, deviations from the harmonic limit remaining, however, of the order of 10%.
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