Koester, Sigrun A.

Tuesday September 6, 2011
Time: 10:30
Place: IBM Rüschlikon, room C 201
Host: Andreas Fuhrer

One-dimensional nanolines and atom chains on the Si(001) surface

Sigrun A. Koester
University of Geneva, Switzerland

Single-atom chains and nanolines on a wide gap substrate are a very attractive embodiment of truly one-dimensional (1d) systems to investigate the remarkable physical properties emerging in such low dimensions. I will present examples of 1d systems self-assembled on the Si(001) surface, namely Bi-nanolines, the subjacent surface reconstruction forming Haiku stripes and Mn atom chains. In our work we compare high resolution scanning tunneling microscopy (STM) images measured at low temperatures with density functional theory (DFT), providing detailed insight into the system structures and properties. While the very long Bi-nanolines and Haiku stripes offer an extensive study of electronic properties, the Mn chains are prospective candidates to observe magnetic properties in one dimension.