Scanning Tunneling Microscope Observation of Si(111)-3*1-Ag Structure.
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A scanning tunneling microscope has been used to study the Si(111)-3× 1-Ag surface. The 3× 1-Ag surface has been observed to consist of a bright row and small protrusions; the bright row points in the ‹ \bar{1}10› direction and the protrusions point in the ‹ 12\bar{3}› and ‹ 21\bar{3}› directions. The width of 3× 1-Ag domains, nucleated on the Si-7× 7 terraces, has been found to be (21n-2)a, where n is an integer (n=1, 2, · · · ) and a is the lattice constant of Si (a=3.84 Å). Detailed investigation on domain boundaries reveals that both sides of the 3× 1-Ag domain face the unfaulted halves of the 7× 7 structure. Moreover, two types of domain boundaries have been observed: one which runs across the corner holes, and another is that runs apart from the corner holes, leaving a narrow 7× 7 terrace of one adatom width. Possible structural models for the 3× 1-Ag surface are proposed based on the present STM results.
- 公益社団法人 応用物理学会の論文
公益社団法人 応用物理学会 | 論文
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