TY - JOUR
T1 - Surface structures of SrTiO3 (001)
T2 - A TiO2-rich reconstruction with a c(4 x 2) unit cell
AU - Erdman, Natasha
AU - Warschkow, Oliver
AU - Asta, Mark
AU - Poeppelmeier, Kenneth R.
AU - Ellis, Donald E.
AU - Marks, Laurence D.
PY - 2003/8/20
Y1 - 2003/8/20
N2 - We report the solution of the c(4 x 2) reconstruction of SrTiO3 (001), obtained through a combination of high-resolution transmission electron microscopy, direct methods analysis, and density functional theory. The structure is characterized by a single overlayer of TiO2 stoichiometry in which TiO5 polyhedra are arranged into edge-shared structures, in contrast to the corner-shared TiO6 polyhedra in bulk. This structural pattern is similar to that reported by us earlier for the (2 x 1) reconstruction of the same crystal face formed at higher temperature. We discuss probable mechanisms of surface stabilization as revealed by these two solutions which are likely to apply to other reconstructions of SrTiO 3 (001) and, possibly, other perovskites in general.
AB - We report the solution of the c(4 x 2) reconstruction of SrTiO3 (001), obtained through a combination of high-resolution transmission electron microscopy, direct methods analysis, and density functional theory. The structure is characterized by a single overlayer of TiO2 stoichiometry in which TiO5 polyhedra are arranged into edge-shared structures, in contrast to the corner-shared TiO6 polyhedra in bulk. This structural pattern is similar to that reported by us earlier for the (2 x 1) reconstruction of the same crystal face formed at higher temperature. We discuss probable mechanisms of surface stabilization as revealed by these two solutions which are likely to apply to other reconstructions of SrTiO 3 (001) and, possibly, other perovskites in general.
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U2 - 10.1021/ja034933h
DO - 10.1021/ja034933h
M3 - Article
C2 - 12914468
AN - SCOPUS:0042020356
VL - 125
SP - 10050
EP - 10056
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 33
ER -