Catalystlike behavior of Si adatoms in the growth of monolayer Al film on Si(111).
The formation mechanism of monolayer Al(111)1x1 film on the Si(111) radical3x radical3-Al substrate was studied by scanning tunneling microscopy and first-principles calculations. We found that the Si adatoms on the radical3x radical3-Al substrate play important roles in the growth process. The growth of Al-1x1 islands is mediated by the formation and decomposition of SiAl(2) clusters. Based on experiments and theoretical simulations we propose a model where free Si atoms exhibit a catalystlike behavior by capturing and releasing Al atoms during the Al film growth.
Teng
Jing
J
Institute of Physics, Chinese Academy of Sciences, Beijing 100080, China.
Zhang
Lixin
L
Jiang
Ying
Y
Guo
Jiandong
J
Guo
Qinlin
Q
Wang
Enge
E
Ebert
Philipp
P
Sakurai
T
T
Wu
Kehui
K