Physics
Scanning tunneling microscope
Raster an atomic surface using a tunneling-current feedback loop.
Try this
Compare constant current and constant height. Slow the scan to reduce feedback lag; a bright electronic patch need not be a tall atom.
The model and its limits
Exponential tunneling surrogate and prescribed atomic topography/local electronic states. No electronic-structure or tip-orbital calculation. Vertical and lateral scales differ.
Equations used in the module
Equations I ∝ |V| ρ_s exp(-2κs) z′ = G ln(I/I_set)/(2κ)
