Scanning Tunneling Microscopy of √<3>×√<3>-Bi Reconstruction on the Si(111) Surface
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概要
- 論文の詳細を見る
Bi-induced (√<3gt;3×√<3gt;3)R30゜ structures formed on the Si(111) surface are studied using scanning tunneling microscopy (STM) and LEED. Three distinct phases: monomer, trimer and honeycomb phases are identified for the first time by STM, depending on the Bi coverage, even though the √<3gt;3×√<3gt;3 symmetry has been always preserved in the LEED observation. At low coverages, Bi atoms are found to occupy the T_4 site. In this adsorption geometry, a monomer phase (α-phase) are formed stably up to an ideal coverage of 1/3 ML. In trimer symmetry (β-phase) at saturation coverage of 1 ML, the individual atoms of the Bi clusters are clearly resolved. Between these two coverages, however, a honeycomb-type √<3gt;3×√<3gt;3 reconstruction has been also found, by STM, to co-exist with the trimer phase. This result reveals a new coverage dependent reconstruction process involving the √<3gt;3×√<3gt;3 reconstruction of Si(111) surface.
- 社団法人応用物理学会の論文
- 1993-02-15
著者
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Park Chan
Institute For Materials Research Tohoku University:(present Address) Jeonbug National University
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Sakurai Toshio
Institute For Materials Research (imr) Tohoku University
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Hashizume Tomihiro
Institute For Materials Research (imr) Tohoku University
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BAKHTIZIN Raouf
Institute for Materials Research, Tohoku University
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Bakhtizin Raouf
Institute For Materials Research Tohoku University:(present Address) Bashkir State University
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Park Chan
Institute For Laser Engineering Kyung Hee University
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