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Photoemission study of Al adlayers on Mn

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons21640

Horn,  Karsten
Molecular Physics, Fritz Haber Institute, Max Planck Society;

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e245404.pdf
(Verlagsversion), 745KB

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Zitation

Dhaka, R. S., Shukla, A. K., Horn, K., & Barman, S. R. (2011). Photoemission study of Al adlayers on Mn. Physical Review B, 84(24): 245404. doi:10.1103/PhysRevB.84.245404.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-3BE0-6
Zusammenfassung
Al overlayers on Mn, studied by photoemission spectroscopy, show a large lowering of the Al 2p core-level binding energy by 0.5 eV at submonolayer (0.1 ML) coverage. The binding energy increases with coverage and reaches the bulk Al value at ≈1.3 ML. The Al 2p core-level spectrum exhibits extra components related to the different chemical environment at the interface, which decrease in intensity with increasing Al coverage. The Al related plasmon loss features appear above 1 ML. The present results are explained by a strong Al s, p-Mn 3d hybridization at the submonolayer coverage due to interface alloying, whose influence on the spectra is dominated by metallic bonding in the Al layer as coverage increases. The valence-band spectra demonstrate systematic suppression of Mn 3d-like states and emergence of a parabolic free-electron-like Al density of states.