Phys. Rev. Lett. 91, 156101 (2003)

Hydrogen-Induced Self-Organized Nanostructuring of the Ir(100) Surface

L. Hammer, W. Meier, A. Klein, P. Landfried, A. Schmidt, and K. Heinz
Lehrstuhl für Festkörperphysik, Universität Erlangen-Nürnberg, Staudtstrasse 7, D-91058 Erlangen, Germany

(Received 27 June 2003; published 8 October 2003)

We show that the Ir(100) surface forms a new nanostructure in a self-organized way when its reconstructed equilibrium surface is exposed to hydrogen. Scanning tunneling microscopy and quantitative low-energy electron diffraction retrieve that a long-range ordered superlattice of defect-free Ir chains with average lateral spacing of 1.36 nm and micrometer lengths develops. This can be used as a template for the formation of other nanostructures as is demonstrated. ©2003 The American Physical Society