Chin. Phys. Lett.  2000, Vol. 17 Issue (1): 49-51    DOI:
Original Articles |
Surface Alloying of Submonolayer Pb on Cu(ll1) Studied by Photoemission
XU Ming-Chun1;QIAN Hai-Jie2;LIU Feng-Qin2;KRASH Ibrahim2;LA1 Wu-Yan1;WU Si-Cheng3
1State Key Laboratory of Magnetics, Center for Condensed Matter Physics, Institute of Physics,Chinese Academy of Sciences, Beijing 100080 2Synchrotron Radiation Laboratory, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100039 3Department of Physics, Peking University, Beijing 100871
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XU Ming-Chun, QIAN Hai-Jie, LIU Feng-Qin et al  2000 Chin. Phys. Lett. 17 49-51
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Abstract The reactions of superthin Pb films on a Cu (111) surface with respect to the coverage of Pb and annealing have been studied by synchrotron radiation photoemission. The submonolayer Pb atoms deposited at room temperature are distributed on the Cu (111) surface as two-dimensional (2D) islands. Annealing to 200oC gives rise to Pb-Cu surface alloy formation. Analyses show that the surface alloy occurs only in the first layer of the Cu (111) surface. As a surfactant, Pb can promote 2D layer-by-layer growth of thin films on Cu (111), but the
Pb-Cu surface alloying may have an unfavorable effect on the activation process.


Keywords: 73.20.-r      79.60.-i      61.82.Bg     
Published: 01 January 2000
PACS:  73.20.-r (Electron states at surfaces and interfaces)  
  79.60.-i (Photoemission and photoelectron spectra)  
  61.82.Bg (Metals and alloys)  
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XU Ming-Chun
QIAN Hai-Jie
LIU Feng-Qin
KRASH Ibrahim
LA Wu-Yan
WU Si-Cheng
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