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Comprehensive study of the metal/semiconductor character of adatom-induced Ag/Si(111) reconstructions
Linköping University, The Institute of Technology. Linköping University, Department of Physics, Chemistry and Biology.
Linköping University, Department of Physics, Chemistry and Biology. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Surface and Semiconductor Physics. Linköping University, The Institute of Technology.
2001 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 64, no 24Article in journal (Refereed) Published
Abstract [en]

A √21×√21 reconstruction can be formed by either Ag or Au adsorption on the Ag/Si(111) √3×√3 surface. The electronic structures determined by angle-resolved photoemission from these two √21×√21 surfaces show clear similarities. The presence of the extra Ag or Au adatoms results in a metallic surface with two surface state bands near the Fermi level. Only one of these bands crosses the Fermi level instead of two as reported in the literature. A tiny amount of Ag deposited onto the √21×√21-Ag surface below 100 K transforms it into a 6×6 periodicity. The additional Ag leads to an interesting transition from the metallic √21×√21 surface to a semiconducting 6×6 surface with a gap of about 0.2 eV with respect to the Fermi level.

Place, publisher, year, edition, pages
2001. Vol. 64, no 24
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:liu:diva-47913DOI: 10.1103/PhysRevB.64.245421ISI: 000173082500115OAI: oai:DiVA.org:liu-47913DiVA: diva2:268809
Available from: 2013-03-27 Created: 2009-10-11 Last updated: 2017-12-13Bibliographically approved

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