Regensburg 2010 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 76: Nanostructures at surfaces: Wires, tubes
O 76.8: Vortrag
Donnerstag, 25. März 2010, 16:45–17:00, H38
Structural and electronic properties of the Bi:Si(001) Haiku reconstruction. — •Sigrun A. Köster1, James H. G. Owen1, François Bianco1, Daniel Mazur1, David R. Bowler2, and Christoph Renner1 — 1Université de Genève, Section Physique/DPMC, Quai Ernest-Ansermet 24, 1211 Genève 4, CH — 2London Centre for Nanotechnology (LCN), University College London, UCL 17-19 Gordon Street, WC1H 0AH, London, UK
There is substantial interest in probing the physical properties of low dimensional systems motivated by the interest in fundamental physics of these systems but also for the development of increasingly small technological devices. Self-assembled bismuth nanolines appear when Bi is deposited onto the Si(001) surface and subsequently annealed [1]. They can reach one micrometer in length and their width is fixed at 1.54 nm owing to the complex underlying Si reconstruction known as the Haiku structure [2]. Exposing the Bi-nanolines to atomic H, we were able to strip off the Bi from the nanoline and expose for the first time the Haiku structure. We present a detailed spectroscopic and structural characterization of the Bi-nanoline and the Haiku using scanning tunneling microscopy and spectroscopy. These results are in excellent agreement with theoretical modelling of the nanowire.
[1] J. H. G. Owen, K. Miki, and D. R. Bowler, J. Mater. Sci. 41, 4568 (2006) [2] J.H.G.Owen, K.Miki, H.Koh, H.W.Yeom and D.R.Bowler, Phys. Rev. Lett. 88, 226104 (2002)