The prominent 5d-orbital contribution to the conduction electrons in gold
The prominent 5d-orbital contribution to the conduction electrons in gold
复制标题
DOI：
10.1088/1367-2630/12/4/043045
复制
发表时间：
2010-04-28
影响因子：
3.3
通讯作者：
Ishikawa, T.
中科院分区：
文献类型：
--
作者：
Sekiyama, A.;Yamaguchi, J.;Ishikawa, T.
我们用最近发展起来的偏振相关硬X射线光电子能谱研究了金和银在名义上充满d轨道的元素周期表中同一列的价带电子结构。与通常的预期相反，我们发现金中的5d轨道电子对传导电子的贡献很大，而银中的传导电子在一定程度上是类自由电子的，4d的贡献可以忽略不计，这可能与金在空气中比银更稳定这一众所周知的事实有关。研究发现，4D电子关联效应对银的传导电子特性是必不可少的。
We have examined the valence-band electronic structures of gold and silver in the same column in the periodic table with nominally filled d orbitals by means of a recently developed polarization-dependent hard x-ray photoemission. Contrary to common expectation, it is found that the 5d-orbital electrons contribute prominently to the conduction electrons in gold, while the conduction electrons in silver are to some extent free-electron-like with negligible 4d contribution, which could be related to the well-known fact that gold is more stable than silver in air. The 4d electron correlation effects are found to be essential for the conduction electron character in silver.