Structural Phase Transition between c(4×2) and p(2×2) Structures on Si(001) Surface under Observation by Scanning Tunneling Microscopy

2007 ◽  
Vol 76 (3) ◽  
pp. 034602 ◽  
Author(s):  
Hiroshi Kawai ◽  
Osamu Narikiyo ◽  
Kensuke Matsufuji
Keyword(s):  
Phase Transition ◽  
Scanning Tunneling Microscopy ◽  
Structural Phase Transition ◽  
Structural Phase ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

Atomic Arrangement of Al Near the Phase Boundaries Between √3×√3-A1 and 7×7 Structures on Si(111) Surfaces

1992 ◽  
Vol 280 ◽  
Author(s):  
Katsuya Takaoka ◽  
Masamichi Yoshimura ◽  
Takafumi Yao ◽  
Tomoshige Sato ◽  
Takashi Sueyoshi ◽  
...  
Keyword(s):  
Phase Transition ◽  
Scanning Tunneling Microscopy ◽  
Domain Boundary ◽  
Scanning Tunneling ◽  
Lower Side ◽  
Tunneling Microscopy ◽  
Phase Boundaries ◽  
Atomic Arrangement ◽  
Dimer Structure

ABSTRACTScanning tunneling microscopy (STM) is used to study the structure of Al-√3×√3 domains on the Si(lll)-7×7 surface and the atomic arrangement near the domain boundary. Al-√3×√3 domains grow from the lower side of the <112> step and extend over the Si-7×7 terrace. The phase transition is observed to occur in units of the 7×7 size. Detailed investigation at around the boundary reveals that faulted halves of the 7×7 unit are adjacent to the boundary on the Si-7×7 side, while on the Al-√3×√3 side, Al adatoms occupy the T4 sites except for the rows adjacent to the phase boundaries where Al atoms occupy the Si adatom sites. The latter Al atoms play an important role to retain the dimer structure at the boundary.

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