Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-05-11
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
33 pages, 9 figures
Scientific paper
During fabrication and scanning-tunneling-microscope (STM) imaging of dangling bonds (DBs) on a hydrogenated silicon surface, we consistently observed halo-like features around isolated DBs for specific imaging conditions. These surround individual or small groups of DBs, have abnormally sharp edges, and cannot be explained by conventional STM theory. Here we investigate the nature of these features by a comprehensive 3-dimensional model of elastic and inelastic charge transfer in the vicinity of a DB. Our essential finding is that non-equilibrium current through the localized electronic state of a DB determines the charging state of the DB. This localized charge distorts the electronic bands of the silicon sample, which in turn affects the STM current in that vicinity causing the halo effect. The influence of various imaging conditions and characteristics of the sample on STM images of DBs is also investigated.
Livadaru Lucian
Pitters Jason
Taucer Marco
Wolkow Robert A.
No associations
LandOfFree
Theory of Non-equilibrium Single Electron Dynamics in STM Imaging of Dangling Bonds on a Hydrogenated Silicon Surface does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Theory of Non-equilibrium Single Electron Dynamics in STM Imaging of Dangling Bonds on a Hydrogenated Silicon Surface, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theory of Non-equilibrium Single Electron Dynamics in STM Imaging of Dangling Bonds on a Hydrogenated Silicon Surface will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-496401