1. Bi- and Au-Induced Reconstructions on GaAs(001)-2 ×4 Surface.
- Author
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Tang Zhe, Yang Shen, Jiang Ying, Wang Wen, Jia Jin, Xue Qi, Wang En, Ge and, and Wu Ke
- Subjects
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MINING engineering , *PARTICLES (Nuclear physics) , *ELECTRON diffraction , *SCANNING probe microscopy - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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