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Title

Manipulating quantum-well states by surface alloying: Pb on ultrathin Ag films

AuthorsHirahara, Toru; Komorida, T.; Sato, A.; Bihlmayer, Gustav; Chulkov, Eugene V. CSIC ORCID; He, K.; Matsuda, I.; Hasegawa, Shuji
KeywordsAlloying
Band structure
Fermi level
Lead
Metallic thin films
Metallic thin films
Photoelectron microscopy
Silver
Surface states
Issue Date3-Jul-2008
PublisherAmerican Physical Society
CitationPhysical Review B 78, 035408 (2008)
AbstractThe electronic structure of ultrathin Ag films with 1/3 monolayer (ML) of Pb alloyed at the surface was investigated by angle-resolved photoemission spectroscopy. Compared to clean ultrathin Ag films, the energy positions of the quantum-well states (QWSs) moved closer to the Fermi level due to the change of the potential barrier at the film/vacuum interface. We found that the parabolic band dispersion of the QWSs become disturbed where they cross the surface-state bands, and furthermore, they were shown to follow the periodicity that is only present at the surface. Our results suggest that it is possible to tune the properties of the QWSs whose thickness is more than 10 ML just by submonolayer deposition of heteroelements at the surface.
Description6 pages, 6 figures.-- PACS nrs.: 68.35.-p, 73.20.-r, 79.60.-i, 71.18.+y.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevB.78.035408
URIhttp://hdl.handle.net/10261/8483
DOI10.1103/PhysRevB.78.035408
ISSN1098-0121
Appears in Collections:(CFM) Artículos




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