Journal
NEW JOURNAL OF PHYSICS
Volume 12, Issue -, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1367-2630/12/4/043045
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Funding
- MEXT, Japan [21740229, 21340101, 20102003, G10]
- JSPS, Japan [21740229, 21340101, 20102003, G10]
- RFFI [08-02-00021, 08-02-91200]
- [MK-614.2009.2]
- Grants-in-Aid for Scientific Research [21740229, 21340101, 20102003] Funding Source: KAKEN
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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.
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