Atomic and Electronic Structures of Si(111)-√21×√21 Superstructure

Y. Fukaya; K. Kubo; T. Hirahara; S. Yamazaki; W. H. Choi; H. W. Yeom; A. Kawasuso; S. Hasegawa; I. Matsuda

doi:10.1380/ejssnt.2012.310

Conference -ISSS-6-

Atomic and Electronic Structures of Si(111)-√21×√21 Superstructure

Y. Fukaya, K. Kubo, T. Hirahara, S. Yamazaki, W. H. Choi, H. W. Yeom, A. Kawasuso, S. Hasegawa, I. Matsuda

Author information

Y. Fukaya
Advanced Science Research Center, Japan Atomic Energy Agency, Japan
K. Kubo
Department of Physics, University of Tokyo, Japan
T. Hirahara
Department of Physics, University of Tokyo, Japan
S. Yamazaki
Department of Physics, University of Tokyo, Japan
W. H. Choi
Department of Physics and Center for Atomic Wires and Layers, Pohang University of Science and Technology, Korea
H. W. Yeom
Department of Physics and Center for Atomic Wires and Layers, Pohang University of Science and Technology, Korea
A. Kawasuso
Advanced Science Research Center, Japan Atomic Energy Agency, Japan
S. Hasegawa
Department of Physics, University of Tokyo, Japan
I. Matsuda
ISSP, University of Tokyo, Japan

Keywords: Two-dimensional alloys, Silicon, Gold, Silver, Electronic structure, Surface structure, Angle-resolved photoemission spectroscopy (ARPES), Scanning tunneling microscopy (STM)

JOURNAL FREE ACCESS

2012 Volume 10 Pages 310-314

DOI https://doi.org/10.1380/ejssnt.2012.310

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Abstract

The √21×√21-(Au,Ag) phase on a Si(111) surface, prepared by the Ag deposition on the Si(111)-5×2-Au surface, was studied by using angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). The surface phase is metallic and has a two-dimensional electronic structure similar to those of the √21×√21 phases prepared by noble metal adsorption on the Si(111)-√3×√3-Ag surface. An additional surface-state was found, which may originate from the Au 6s and 6p orbitals. [DOI: 10.1380/ejssnt.2012.310]

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