In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 6S ( 1995-06-01), p. 3346-
Abstract:
High temperature scanning tunneling microscopy (STM) observation has been performed to investigate the energetic stability of metastable structures of Si(111) surfaces. Upon supercooling from 1100°C, 5×5 and 9×9 structures have been observed at 600°C, as well as the reconstructed 7×7 and disordered 1×1 areas. The 5×5 and 9×9 areas shrink to disappear as a consequence of the growth of 7×7 domains. The smaller domain size and the faster shrinking speed of the 9×9 structure indicate its lower stability compared to the 5×5 structure. The 11×11 and 13×13 DAS structures were occasionally observed at above 500°C, however, suggesting lower stability than the (2 n +1)×(2 n +1) DAS structures with smaller n . The √3×√3 structures also appear at high-temperatures below 550°C, whereas the 2×2, c 2×4, and c 2×8 structures are observed only at room temperatures. Clear STM images of the √3×√3 structure can rarely be obtained at temperatures higher than 600°C, which is considered to be due to the thermally excited random motion of Si adatoms.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.34.3346
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1995
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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