title: Structure determination of the Si3N4/Si(111)- (8 x 8) surface: a combined study of Kikuchi electron holography, scanning tunneling microscopy, and ab initio calculations.
abstract: A comprehensive atomic model for the reconstructed surface of Si3N4 thin layer grown on Si(111) is presented. Kikuchi electron holography images clearly show the existence of adatoms on the Si3N4(0001)/Si(111)-(8x8) surface. Compared with the ab initio calculations, more than 30 symmetry-inequivalent atomic pairs in the outmost layers are successfully identified. Scanning tunneling microscopy (STM) images show diamond-shaped unit cells and nine adatoms in each cell. High-resolution STM images reveal extra features and are in good agreement with the partial charge density distribution obtained from total-energy calculations.
authors: Department of Physics, National Tsing-Hua University, Hsinchu, Taiwan 300, Republic of China.
authors: H
authors: H
authors: Ahn
authors: C L
authors: CL
authors: Wu
authors: S
authors: S
authors: Gwo
authors: C M
authors: CM
authors: Wei
authors: Y C
authors: YC
authors: Chou