Local symmetry in liquid metals probed by x-ray absorption spectroscopy

16th International Conference on X-ray Absorption Fine Structure

Iesari, Fabio^1 ; Di Cicco, Andrea^1

Physics Division, School of Science and Technology, University of Camerino, Italy^1

关键词: Bond-angle distribution;    Diffraction techniques;    High sensitivity;    Long range orders;    Monoatomic liquids;    Reverse Monte Carlo;    Short range ordering;    Structural models;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012038/pdf
DOI  :  10.1088/1742-6596/712/1/012038

来源: IOP

【 摘 要 】

The nature of local point symmetry in simple monoatomic liquids has been a fundamental open question for almost 40 years of computational and experimental studies. We present original results of local ordering in different monoatomic liquids obtained by x-ray absorption spectroscopy (XAS), exploiting its high sensitivity to short-range ordering. We used Reverse Monte Carlo (RMC) analysis (RMC-GNXAS package) for obtaining structural models compatible with XAS experimental data (and diffraction techniques for long-range ordering). Pair, bond-angle distributions and suitable indicators for point symmetry are calculated for different liquid metals.