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首页> 外文期刊>Physical review, B. Condensed matter and materials physics >High-resolution photoemission spectroscopy study of the single-domain Si(110)-16x2 surface
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High-resolution photoemission spectroscopy study of the single-domain Si(110)-16x2 surface

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We have investigated the valence band structure and Si 2p photoemission spectra of the single-domain Si(110)-16x2 surface with higher resolution than previous studies. We found that the highest occupied surface state, reported to be dispersive in the previous studies, is resolved into the two surface states with flat energy dispersions. This reveals that the two surface states are not produced by Si pi-bonded chains, as suggested in the previous studies, but originate from the building blocks with spatially localized electronic structures such as a Si tetramer and a Si adatom. Si 2p line shapes show directly five surface components without any curve fitting. Various atomic structure models, especially the adatom-tetramer-interstitial model, of the Si(110)-16x2 surface are considered to figure out the atomistic origins of the surface components and states.

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