Abstract
Na adsorption on the Si(100)(2 X 1) surface at the saturation coverage was investigated using field-ion scanning tunneling microscopy/spectroscopy (FI-STM/STS). The Na saturated surface has a (2 X 1) dimerized structure, similar to that of the clean (2 X 1) surface. In the STM image, each dimer is imaged to be bifurcated in the filled states. The STS measurement showed a large energy gap of approximately 1 eV, suggesting that the Na/Si(100)-(2 X 1) surface has the semiconductor-like electronic states of the surface. These observations are consistent with the double-layer model proposed by Kono's group and a recent theoretical study by Terakura's group.
Original language | English |
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Pages (from-to) | 261-265 |
Number of pages | 5 |
Journal | Applied Surface Science |
Volume | 67 |
Issue number | 1-4 |
DOIs | |
Publication status | Published - 1993 Apr 2 |
ASJC Scopus subject areas
- Chemistry(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Surfaces, Coatings and Films