Chin. Phys. Lett.  2008, Vol. 25 Issue (8): 2977-2980    DOI:
Original Articles |
Bi- and Au-Induced Reconstructions on GaAs(001)-2×4 Surface
TANG Zhe, YANG Shen-Yuan, JIANG Ying, WANG Wen-Xin, JIA Jin-Feng, XUE
Qi-Kun, WANG En-Ge, WU Ke-Hui
Institute of Physics, Chinese Academy of Sciences, Beijing 100080
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TANG Zhe, YANG Shen-Yuan, JIANG Ying et al  2008 Chin. Phys. Lett. 25 2977-2980
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Abstract Submonolayer Bi and Au adsorptions on the GaAs(001)-2×4 surface are investigated by scanning tunnelling microscopy, low energy electron diffraction and first-principles calculations. The 1×4 and 3×4 reconstructed surface induced by Bi and Au, respectively, are revealed and their structural models are proposed based on experiments and first-principles calculations. Moreover, the validity of the recently proposed generalized electron counting (GEC) model [Phys. Rev. Lett. 97 (2006) 126103] is examined in detail by using the two surfaces. The GEC model perfectly explains the structural features, such as the characteristic short double-line structure in the Bi-1×4 surface and the 3× arrangement of four-atom Au clusters.
Keywords: 68.35.-p      68.43.Fg      68.37.Ef     
Received: 12 May 2008      Published: 25 July 2008
PACS:  68.35.-p (Solid surfaces and solid-solid interfaces: structure and energetics)  
  68.43.Fg (Adsorbate structure (binding sites, geometry))  
  68.37.Ef (Scanning tunneling microscopy (including chemistry induced with STM))  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2008/V25/I8/02977
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TANG Zhe
YANG Shen-Yuan
JIANG Ying
WANG Wen-Xin
JIA Jin-Feng
XUEQi-Kun
WANG En-Ge
WU Ke-Hui
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