Journal
PHYSICAL REVIEW B
Volume 80, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.80.035438
Keywords
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Funding
- Swiss National Science Foundation
- MaNEP NCCR
- Bundesministerium fur Bildung und Forschung (BMBF) [05KS7WW1]
- National Science Foundation [DMR-0537588]
- Alexander von Humboldt foundation
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We have studied by angle-resolved photoelectron spectroscopy the ordered XCu2 surface alloys formed by X=Sb and Bi on a Cu(111) substrate. We found clear analogies with the corresponding XAg2 alloys formed by the same elements on Ag(111). The electronic states near the Fermi level are similarly split by the spin-orbit (SO) interaction with the smaller splitting in XCu2 reflecting the smaller atomic SO parameter of Cu vs Ag. The charge transfer from the Bi and Sb adatoms to the substrate atoms and their outward relaxation are different for two substrates; both determine the Fermi energy of the two-dimensional electron gas.
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