title: Metallic Properties of the Si(111) - 5 × 2 - Au Surface from Infrared Plasmon Polaritons and Ab Initio Theory.
abstract: The metal-atom chains on the Si(111) - 5 × 2 - Au surface represent an exceedingly interesting system for the understanding of one-dimensional electrical interconnects. While other metal-atom chain structures on silicon suffer from metal-to-insulator transitions, Si(111) - 5 × 2 - Au stays metallic at least down to 20 K as we have proven by the anisotropic absorption from localized plasmon polaritons in the infrared. A quantitative analysis of the infrared plasmonic signal done here for the first time yields valuable band structure information in agreement with the theoretically derived data. The experimental and theoretical results are consistently explained in the framework of the atomic geometry, electronic structure, and IR spectra of the recent Kwon-Kang model.
authors.affiliation: †Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
authors.forename: Fabian
authors.initials: F
authors.lastname: Hötzel
authors.affiliation: ‡Institute of Condensed Matter Theory and Solid State Optics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: Kaori
authors.initials: K
authors.lastname: Seino
authors.affiliation: †Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Huck
authors.affiliation: †Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
authors.forename: Olaf
authors.initials: O
authors.lastname: Skibbe
authors.affiliation: ‡Institute of Condensed Matter Theory and Solid State Optics, Friedrich Schiller University Jena, Max-Wien-Platz 1, 07743 Jena, Germany.
authors.forename: Friedhelm
authors.initials: F
authors.lastname: Bechstedt
authors.affiliation: †Kirchhoff-Institute for Physics, Heidelberg University, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany.
authors.forename: Annemarie
authors.initials: A
authors.lastname: Pucci
keywords: Au adsorbate; Nanowire; Si(111) surface; electronic structure; one-dimensional; plasmon