Prominent 5d-orbital contribution to the conduction electrons in gold

Details Prominent 5d-orbital contribution to the conduction electrons in gold Prominent 5d-orbital contribution to the conduction electrons in gold

2010-03-17

arxiv.org/abs/1003.3294v1

New J. Phys. 12, 043045 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

8 pages, 4 figures, to be appeared in New J. Phys.

Scientific paper

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 a 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 a 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.

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