Surface structure of the missing-row reconstruction of VC0.8(110): a scanning tunneling microscopy analysis
| Autor: | Peter Varga, W. Hebenstreit, Y. Gauthier, Michael Schmid |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
Surface (mathematics)
Chemistry Surfaces and Interfaces Grating Condensed Matter Physics Molecular physics Surfaces Coatings and Films law.invention Crystallography law Pairing Microscopy Materials Chemistry Scanning tunneling microscope Superstructure (condensed matter) Surface reconstruction Quantum tunnelling |
| Zdroj: | Surface Science. 547:394-402 |
| ISSN: | 0039-6028 |
| DOI: | 10.1016/j.susc.2003.10.016 |
| Popis: | Scanning tunnelling microscopy (STM) was used to study the (1 1 0) surface of a VC 0.8 sample. The surface shows a missing-row reconstruction, i.e., a grating structure with ridges and valleys oriented along the [0 0 1] direction and (1 0 0) and (0 1 0) facets. We did not find unreconstructed (1 1 0) terraces. The regular spacing of the ridges corresponds to a periodicity of (3 × 1) or (4 × 1), depending on preparation, presumably related to different concentrations of carbon vacancies. In the STM images, we can also observe apparent pairing of atoms in the rows, leading to the larger c(6 × 2) and (4 × 2) superstructure cells, which also show up in LEED. We attribute these additional periodicities to ordering of carbon vacancies in the surface rows. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect