电子能量损失谱中的魔角之谜：相对论和介电修正
The Magic Angle "Mystery" in Electron Energy Loss Spectroscopy: Relativistic and Dielectric Corrections
摘要：
最近的研究表明，仔细处理电子能量损失谱中的纵向和横向矩阵元可以解释相对论效应对{ \it魔角}的神秘影响。在这里，我们表明，有一个额外的修正顺序$(Zα)^2$，其中$Z$是原子序数和$α$的精细结构常数，这不一定是小的重元素。此外，我们认为宏观电动力学效应可以给出进一步的修正，这可以打破魔角的样本无关性。
英文摘要：
Recently it has been demonstrated that a careful treatment of both longitudinal and transverse matrix elements in electron energy loss spectra can explain the mystery of relativistic effects on the {\it magic angle}. Here we show that there is an additional correction of order $(Zα)^2$ where $Z$ is the atomic number and $α$ the fine structure constant, which is not necessarily small for heavy elements. Moreover, we suggest that macroscopic electrodynamic effects can give further corrections which can break the sample-independence of the magic angle.
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