Self-organized two-dimensional lattice of magic clusters
- 3 December 2001
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 64 (24), 241404
- https://doi.org/10.1103/physrevb.64.241404
Abstract
Under certain deposition conditions, gallium induces almost exclusive formation of a type of especially stable clusters—magic clusters, on the 7×7-reconstructed silicon(111) surface. The cluster has a triangular closed-shell structure and resides on the center of a half unit-cell. As the gallium coverage is increased, the cluster density increases proportionally, leading essentially to the complete filling of the half unit-cells and the creation of an unprecedented two-dimensional lattice of magic clusters. A structure model employing three silicon atoms to link six gallium atoms into a configuration with satisfied bonding is proposed to qualitatively account for the cluster’s stability.
Keywords
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