Iridium-modified Si(111) surface.
The physical and electronic properties of Ir-modified Si(111) surface have been investigated with the help of STM (scanning tunneling microscopy) and LEED (low energy electron diffraction). The LEED pattern of the surface exhibits [Formula: see text] reconstruction. STM images show that [Formula: see text]° reconstruction originates from the Ir-ring clusters. STS (scanning tunneling spectroscopy) measurements on the ring clusters reveal a state located about 0.3 eV below the Fermi level. A careful analysis shows that this state originates from [Formula: see text]° domains of Ir-modified Si(111) surface.
Department of Physics and Astrophysics, University of North Dakota, Grand Forks, 58202, USA.
Dylan
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Nicholls
Nuri
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Oncel