论文标题
在硬壁表面上没有表面血浆波
Absence of surface plasma waves on hard-wall surfaces
论文作者
论文摘要
似乎已经牢固地确定了表面等离子体波（SPW）可能存在于任何金属表面上，包括\ textit {ab libio}在金属介电响应的研究中经常使用的理想硬壁类型的表面。在这里，我们表明托管在硬壁表面上的表面波不是SPW。尽管他们拥有著名的频率$ω_p/\ sqrt {2} $，其中$ω_p$是体积等离子体波频率，但这些波显示在无限波长限制中没有电荷。相反，SPW始终与位于表面上的有限电荷密度相关。这一发现纠正了一个历史错误，并要求重新评估无数工作，这些工作解释了基于硬壁模型和相关模型（例如镜面反射模型）来解释实验数据（例如电子能量损失光谱）。
It seems having been firmly established that surface plasma waves (SPWs) could exist on any metal surfaces, including those of the ideal hard-wall type frequently employed in \textit{ab initio} studies of the dielectric responses of metals. Here we show that the surface waves hosted on hard-wall surface are not SPWs. Though they possess the celebrated frequency $ω_p/\sqrt{2}$, where $ω_p$ is the volume plasma wave frequency, these waves are shown devoid of charges in the infinite wavelength limit. In contrast, SPWs are always associated with a finite density of charges localized on the surface. This finding corrects a historical mistake and calls for a reappraisal of innumerable work that interpret experimental data (e.g. electron energy loss spectroscopy) based on the hard-wall model and related models such as the specular reflection model.
