Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.21: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Single one-dimensional nanolines and atom chains on the semiconductiong Si(001) surface — •Sigrun A. Köster1, François Bianco1, James G. H. Owen1, David R. Bowler2, and Christoph Renner1 — 1University of Geneva, Switzerland — 2University College London/London Centre of Nanotechnology, UK
Single-atom chains on a wide gap substrate are a very attractive embodiment of a truly one-dimensional system to explore the remarkable physical properties emerging in such low dimensions. We present examples of self-assembled one-dimensional systems on the Si(001) surface, that is, Bi nanolines [1], Haiku stripes [2,3] and single atom Mn chains. All lines grow perpendicular to the Si(001) dimer rows, at densities which can be adjusted by means of the growth parameter. Therefore we can establish chains isolated on a semiconducting background or produce a dense array of possibly interacting chains. High resolution scanning tunneling microscopy (STM) micrographs are in perfect agreement with density functional theory (DFT), providing detailed insight into the chain structures. We further discuss low temperature STM spectroscopy suggesting that our chains are indeed suitable candidates to investigate the electronic properties in one dimension.
[1] J. H. G. Owen, K. Miki, D. R. Bowler, J. Mater. Sci. 41 (2006) 4568
[2] F. Bianco, J. H. G. Owen, S. A. Köster, D. Mazur, Ch. Renner and D.R. Bowler, Phys. Rev. B 84, 035328 (2011)
[3] J. H. G. Owen, F. Bianco, S. A. Köster, D. Mazur, D. R. Bowler and Ch. Renner, Appl. Phys. Lett. 97 (2010) 093102