e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
ISSN-L : 1348-0391
Regular Papers
Photoemission Structure Factor Effect for Fermi Rings of the Si(111)√3×√3-Ag Surface
Toru HiraharaIwao MatsudaShuji Hasegawa
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2004 Volume 2 Pages 141-145

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Abstract

The energy contour at Fermi level (Fermi surface) of the Si(111)√3×√3-Ag superstructure was measured in several surface Brillouin zones (SBZs) by high resolution angle-resolved photoemission spectroscopy (ARPES). Fermi rings centered at Gamma points were observed only in the second SBZs, but missing in the first SBZ. This phenomenon was successfully reproduced by a calculation of the optical transition matrix based on a simple tight-binding approximation for the surface topmost-layer Ag atoms; the intensity in the first SBZ is diminished by destructive interferences in the matrix elements ( i.e., photoemission structure factor). Thus with the known atomic orbital components of the surface structure, we can predict the photoemission intensity distribution and correctly understand the band structure. [DOI: 10.1380/ejssnt.2004.141]

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この記事はクリエイティブ・コモンズ [表示 4.0 国際]ライセンスの下に提供されています。
https://creativecommons.org/licenses/by/4.0/deed.ja
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