Europhys. Lett.
Volume 65, Number 6, March 2004
Page(s) 830 - 836
Section Interdisciplinary physics and related areas of science and technology
Published online 01 March 2004
Europhys. Lett., 65 (6) , pp. 830-836 (2004)
DOI: 10.1209/epl/i2003-10135-x

Lateral nanoscale $\chem{Fe}$- $\chem{Ir}$ superlattices on $\chem{Ir(100)}$

A. Klein, A. Schmidt, L. Hammer and K. Heinz

Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg Staudtstr. 7, D-91058 Erlangen, Germany

(Received 3 November 2003; accepted in final form 26 January 2004)

It is shown by scanning tunnelling microscopy (STM) that the $\chem{Ir(100)}$ surface can be used as a template to form other nanostructures after it has restructured upon exposure to hydrogen. Extremely long and defect-free $\chem{Ir}$ nanowires produced in the restructuring process can be decorated by, e.g., $\chem{Fe}$ so that FeIrFe nanochains develop as sandwiches of atomically thin $\chem{Fe}$ and $\chem{Ir}$ wires. Laterally they recur with 1.36 $\un{nm}$ periodicity on average, i.e. two atomic rows are missing between two sandwiches. By additional deposition of $\chem{Fe}$ this space can be filled so that the vacancy spaced { $\chem{FeIrFe}$} lateral superlattice transforms to a { $\chem{Fe_4Ir}$} superlattice. Their crystallography is determined by quantitative low-energy electron diffraction (LEED).

81.07.-b - Nanoscale materials and structures: fabrication and characterization.
68.65.La - Quantum wires.
68.65.Cd - Superlattices.

© EDP Sciences 2004