铌的非共振价态到芯能级X射线发射光谱
Nonresonant valence-to-core x-ray emission spectroscopy of niobium.
作者信息
Ravel Bruce, Kropf A Jeremy, Yang Dali, Wang Mengen, Topsakal Mehmet, Lu Deyu, Stennett Martin C, Hyatt Neil C
机构信息
National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA.
Argonne National Laboratory, Argonne, Illinois 60439, USA.
出版信息
Phys Rev B. 2018;97. doi: 10.1103/PhysRevB.97.125139.
Abstract
The valence-to-core (V2C) portion of x-ray emission spectroscopy (XES) measures the electron states close to the Fermi level. These states are involved in bonding, thus providing a measure of the chemistry of the material. In this article, we show the V2C XES spectra for several niobium compounds. The ″ peak in the V2C XES results from the transition of a ligand 2 electron into the 1 core-hole of the niobium, a transition allowed by hybridization with the niobium 4. This location in energy of this weak peak shows a strong ligand dependence, thus providing a sensitive probe of the ligand environment about the niobium.
摘要
X射线发射光谱（XES）的价带至芯能级（V2C）部分测量靠近费米能级的电子态。这些态参与成键，从而提供了对材料化学性质的一种度量。在本文中，我们展示了几种铌化合物的V2C XES光谱。V2C XES中的“峰”是由配体2电子跃迁到铌的1个芯能级空穴中产生的，这种跃迁通过与铌4的杂化而得以允许。这个弱峰的能量位置显示出强烈的配体依赖性，从而提供了一个关于铌周围配体环境的灵敏探针。
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