Self-assembled Pt nanowires on Ge(001): Relaxation effects

Udo Schwingenschloegl*, C. Schuster

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

Absorption of Pt on the Ge(001) surface results in stable self-organized Pt nanowires, extending over some hundred nanometers. Based on band structure calculations within density functional theory and the generalized gradient approximation, the structural relaxation of the Ge-Pt surface is investigated. The surface reconstruction pattern obtained agrees well with findings from scanning tunneling microscopy. In particular, strong Pt-Pt dimerization is characteristical for the nanowires. The surface electronic structure is significantly perturbed due to Ge-Pt interaction, which induces remarkable shifts of Ge states towards the Fermi energy. As a consequence, the topmost Ge layers are subject to a metal-insulator transition.

Original languageEnglish (US)
Article number26001
JournalEPL
Volume81
Issue number2
DOIs
StatePublished - Jan 1 2008

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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