Experimental and Theoretical Evidence of a Highly Ordered Two-Dimensional Sn/Ag Alloy on Si(111)
2012 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 109, no 5, 057601- p.Article in journal (Refereed) Published
The existence of a highly ordered, two-dimensional, Sn/Ag alloy on Si(111) is reported in this study. We present detailed atomic and electronic structures of the one atomic layer thick alloy, exhibiting a 2 x 2 periodicity. The electronic structure is metallic due to a free-electron-like surface band dispersing across the Fermi level. By electron doping, the electronic structure can be converted into a semiconducting state. A rotated Sn trimer constitutes the key structural element that could be identified by a detailed analysis of constant energy contours derived from the free-electron-like band.
Place, publisher, year, edition, pages
American Physical Society , 2012. Vol. 109, no 5, 057601- p.
Engineering and Technology
IdentifiersURN: urn:nbn:se:liu:diva-80784DOI: 10.1103/PhysRevLett.109.057601ISI: 000306995700019OAI: oai:DiVA.org:liu-80784DiVA: diva2:548273
Funding Agencies|Swedish Research Council|621-2010-37462008-6582|Linkoping Linnaeus Initiative for Novel Functional Materials (LiLi-NFM)||Knut and Alice Wallenberg foundation (KAW)||2012-08-302012-08-302014-03-14Bibliographically approved