Unknown

Dataset Information

0

Transition from Reconstruction toward Thin Film on the (110) Surface of Strontium Titanate.


ABSTRACT: The surfaces of metal oxides often are reconstructed with a geometry and composition that is considerably different from a simple termination of the bulk. Such structures can also be viewed as ultrathin films, epitaxed on a substrate. Here, the reconstructions of the SrTiO3 (110) surface are studied combining scanning tunneling microscopy (STM), transmission electron diffraction, and X-ray absorption spectroscopy (XAS), and analyzed with density functional theory calculations. Whereas SrTiO3 (110) invariably terminates with an overlayer of titania, with increasing density its structure switches from n × 1 to 2 × n. At the same time the coordination of the Ti atoms changes from a network of corner-sharing tetrahedra to a double layer of edge-shared octahedra with bridging units of octahedrally coordinated strontium. This transition from the n × 1 to 2 × n reconstructions is a transition from a pseudomorphically stabilized tetrahedral network toward an octahedral titania thin film with stress-relief from octahedral strontia units at the surface.

SUBMITTER: Wang Z 

PROVIDER: S-EPMC4834633 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature

Similar Datasets

| S-EPMC8144905 | biostudies-literature
| S-EPMC5448959 | biostudies-other
| S-EPMC7068718 | biostudies-literature
| S-EPMC6461459 | biostudies-literature
| S-EPMC6395818 | biostudies-literature
| S-EPMC3914394 | biostudies-literature
| S-EPMC6181932 | biostudies-literature
| S-EPMC7763848 | biostudies-literature
| S-EPMC8724801 | biostudies-literature
| S-EPMC8153544 | biostudies-literature