Photoemission study of Al adlayers on Mn

Article

关键词: ELECTRONIC-STRUCTURE;    ALUMINUM FILMS;    GROWTH;    INTERFACE;    SURFACES;    SPECTRA;    PT(111);    AL(111);    ALLOYS;    LEED;   

DOI  :  10.1103/PhysRevB.84.245404

来源: SCIE

【 摘 要 】

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 approximate to 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.

【 授权许可】

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