| Original Articles |
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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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| Cite this article: |
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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.
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| Keywords:
68.35.-p
68.43.Fg
68.37.Ef
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Received: 12 May 2008
Published: 25 July 2008
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| PACS: |
68.35.-p
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(Solid surfaces and solid-solid interfaces: structure and energetics)
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68.43.Fg
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(Adsorbate structure (binding sites, geometry))
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68.37.Ef
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(Scanning tunneling microscopy (including chemistry induced with STM))
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