11.Jing Teng, Lixin Zhang, Kehui Wu, Ying Jiang, Jiandong Guo, Qinlin Guo, Philipp Ebert, T. Sakurai and Enge Wang, Catalyst-like behavior of Si adatoms in the growth of monolayer Al film on Si(111), JOURNAL of CHEMICAL PHYSICS 133, 014704 (2010).