J. Phys.: Condens. Matter 21 (7 October 2009) 405001 (6pp) doi: 10.1088/0953-8984/21/40/405001
Structure determination of Bi/Ge(111)-
by dynamical low-energy electron diffraction analysis and scanning tunneling
microscopy
Yoshiyuki Ohtsubo1,2, Shinichiro Hatta1,2, Manabu Iwata1, Koichiro Yaji1,2, Hiroshi Okuyama1 and Tetsuya Aruga1,2
1 Department of Chemistry, Graduate School of Science, Kyoto University, Kyoto
606-8502,
Japan
2 JST CREST, Saitama 332-0012,
Japan
E-mail: aruga@kuchem.kyoto-u.ac.jpAbstract.
We have determined the atomic structure of the Bi/Ge(111)- surface by dynamical low-energy electron diffraction (LEED) analysis and scanning tunneling
microscopy (STM). The optimized atomic structure consists of Bi atoms which are adsorbed near
the T1
sites of the bulk-truncated Ge(111) surface and form triangular trimer units centered at the
T4
sites. The atomically resolved STM image was consistent with the LEED result. The
structural parameters agree well with those optimized by a first-principles calculation
which supports the interpretation of the electronic band splitting on this surface in terms of
the giant Rashba effect.
Print publication: Issue 40 (7 October 2009)Received 14 July 2009
Published 8 September 2009
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