Formation of atomic Pt chains on Ge(001) studied by scanning tunneling microscopy

Share/Save/Bookmark

Fischer, Marinus and Houselt, Arie van and Kockmann, Daan and Poelsema, Bene and Zandvliet, Harold J.W. (2007) Formation of atomic Pt chains on Ge(001) studied by scanning tunneling microscopy. Physical Review B: Condensed matter and materials physics, 76 (24). p. 245429. ISSN 1098-0121

[img] PDF
Restricted to UT campus only
: Request a copy
1MB
Abstract:Recently, it was found that atomic Pt chains can be grown on Ge(001) surfaces. These kink-free wires only grow on specific Pt-modified, so-called beta terraces, which are one atom wide and up to a micron long. Their self-assembly includes a crucial, high-temperature annealing step, following low-temperature (sub-) monolayer deposition. So far, details of the formation process remained unclarified. Here, we report on the formation of the Pt atomic chains on the Ge(001) surface after a high-temperature annealing at 1100 K. The results suggest that at high temperature, the platinum, previously submerged during and after deposition, emerges and forms Pt dimers located in the troughs between the surface dimer rows, which locally widen in this process. These Pt dimers are initially oriented parallel to the substrate dimers. However, upon surpassing a critical local coverage, the Pt dimers rotate by 90°, resulting in a zipperlike formation of the Pt chains.
Item Type:Article
Copyright:© 2007 American Physical Society
Faculty:
Science and Technology (TNW)
Research Group:
Link to this item:http://purl.utwente.nl/publications/58263
Official URL:http://dx.doi.org/10.1103/PhysRevB.76.245429
Export this item as:BibTeX
EndNote
HTML Citation
Reference Manager

 

Repository Staff Only: item control page

Metis ID: 242123