Single atom wire; Tunneling spectroscopy; Scanning tunneling microscopy; Spin polarized scanning tunneling microscopy; Low dimensional magnetism; Tomanaga Luttinger liquid
Bianco F., Köster S.A., Longobardi M., Owen J.H.G., Bowler D.R., Renner Ch. (2013), One-dimensional silicon nanolines in the Si(001):H surface, in 7th International Workshop on Nano-scale Spectroscopy and Nanotechnology
, ZurichAIP conference proceedings, USA.
Bianco François, Bowler David R., Owne James H.G., Köster Sigrun A., Longobardi Maria, Renner Christoph (2013), Scalable Patterning of One-Dimensional Dangling Bond Rows on Hydrogenated Si(001), in ACS Nano
, 7(5), 4422-4428.
Liu H. J., Owen J. H. G., Miki K. (2012), Degenerate electronic structure of reconstructed MnSi1.7 nanowires on Si(001), in Journal of Physics: Condensed Matter
, 24, 095005-5.
The goal of this three year project is to explore exotic quantum phenomena that emerge in sol-ids approaching the limiting case of one dimension. The Fermi-liquid theory describing conventional bulk conductors breaks down in one-dimensional systems, which are predicted to be-have remarkably different. However, the unusual properties of the non-Fermi liquid counter-part, the Tomanaga-Luttinger liquid (TLL), remain largely untested by experiment due to the lack of a suitable model system for electronic systems. Our proposal is to take advantage of the Haiku stripe (HS), a novel self-assembled nanowire we have uncovered on the Si(001) surface during the precursor project (SNF grant 200021-119978), to explore the intrinsic physical properties of the ultimate one-dimensional model system - a single atom chain. The HS is a remarkable, perfectly straight and defect free silicon-in-silicon endotaxial nanoline that offers many unique features to realize this ambitious goal. Firstly, theory predicts a one dimensional electronic state above the conduction band minimum along the HS, which might well be a suit-able model system in its own right. Secondly, the HS is a promising template to self-assemble single-atom chains of selected species. It is stable in ultra high vacuum (UHV) up to 400°C and survives momentary exposure to air at room temperature. It can grow micrometer-scale long at a constant width of 1.5nm, long enough to allow electrical connections to lithographically defined metallic electrodes. Air stability and the prediction of subsurface absorption sites along the HS open the unprecedented prospect of self-assembling single-atom chains that can be taken for a moment out of the UHV environment for further processing and analysis. Moreover, the chains are expected to be electronically decoupled from the substrate, owing to the band gap of the semiconductor substrate. These are unique features, bringing transport measurements, electronic and magnetic characterizations of a single isolated nanowire, possibly a single-atom chain, within the realm of experimental scrutiny. In addition to fundamental 1D physics, we anticipate novel insight into magnetism in a non magnetic medium by structuring at the nanoscale, a very modern topic with great implications for spintronics.