Electronic structure of Au-induced surface phases on Si(110): LEED and angle-resolved photoemission measurements

Se Hun Kang, Keun Su Kim, Han Woong Yeom

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Au-induced reconstructions of the Si(110) surface have been studied using low-energy electron diffraction and angle-resolved photoemission (ARP). Low-energy electron diffraction reveals three well-ordered phases: 1×2, 2×5, and (4,0) × (1̄, 3), depending on the Au coverage in accordance with previous studies. The highest coverage phase is observed to be mixed with a (4,0) × (3̄, 3) phase. ARP spectra show no clear surface-state bands on the 1×2 surface within the bulk band gap. The 2×5 surface composed of one-dimensional (1D) atomic chain exhibits two dispersive metallic bands with exact quarter and half fillings. Their Fermi surfaces are straight lines within the experimental accuracy indicating strong 1D characters. This phase is thus one of the most ideal 1D metallic systems ever fabricated on solid surfaces. The (4,0) × (1̄, 3) surface has only one strongly dispersing but semiconducting band following the ×2 periodicity apparently.

Original languageEnglish
Article number075315
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume78
Issue number7
DOIs
Publication statusPublished - 2008 Aug 19

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Photoemission
Electronic structure
photoelectric emission
electronic structure
Low energy electron diffraction
electron diffraction
Fermi surface
dispersing
Surface states
solid surfaces
Fermi surfaces
periodic variations
Energy gap
energy

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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abstract = "Au-induced reconstructions of the Si(110) surface have been studied using low-energy electron diffraction and angle-resolved photoemission (ARP). Low-energy electron diffraction reveals three well-ordered phases: 1×2, 2×5, and (4,0) × (1̄, 3), depending on the Au coverage in accordance with previous studies. The highest coverage phase is observed to be mixed with a (4,0) × (3̄, 3) phase. ARP spectra show no clear surface-state bands on the 1×2 surface within the bulk band gap. The 2×5 surface composed of one-dimensional (1D) atomic chain exhibits two dispersive metallic bands with exact quarter and half fillings. Their Fermi surfaces are straight lines within the experimental accuracy indicating strong 1D characters. This phase is thus one of the most ideal 1D metallic systems ever fabricated on solid surfaces. The (4,0) × (1̄, 3) surface has only one strongly dispersing but semiconducting band following the ×2 periodicity apparently.",
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Electronic structure of Au-induced surface phases on Si(110) : LEED and angle-resolved photoemission measurements. / Kang, Se Hun; Kim, Keun Su; Yeom, Han Woong.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 7, 075315, 19.08.2008.

Research output: Contribution to journalArticle

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