Real-Space Dynamic Electron Correlation in Beryllium

초록

Electron correlation in solids has a major impact on material properties. However, it has been studied mainly by theory, with very limited direct experimental investigations. Here, we demonstrate that dynamic electron correlation function can be experimentally measured using inelastic x-ray scattering on polycrystalline beryllium. The data are expressed as the energy-resolved dynamic pair-distribution function. Our results confirm the size of the exchange-correlation hole as similar to 2 & Aring;, consistent with theoretical expectations. However, at the plasmon energy of similar to 21 eV, the exchange-correlation hole is extended up to 4-5 & Aring;, suggesting a unique influence of the dynamic plasmon state.

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