High-resolution electron energy loss spectroscopy was used to investigate the electronic properties of (111)-oriented Au ultrathin films grown on Cu(111). The loss spectrum showed several features which were ascribed to both single and collective excitations. In particular we distinguished features assignable to dispersionless single-particle transitions and the dispersing electron-hole continuum as well as the ordinary and s-like surface plasmon, and the multipole surface plasmon.

中文翻译：

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电子能量损失谱研究金薄膜的电子特性

高分辨率电子能量损失光谱用于研究在 Cu(111) 上生长的 (111) 取向 Au 超薄膜的电子特性。损失谱显示了几个归因于单个和集体激发的特征。特别是，我们区分了可分配给无色散单粒子跃迁和色散电子 - 空穴连续体以及普通和类 s 表面等离子体以及多极表面等离子体的特征。