Conductance images between two STM probes in graphene

Theoretical Analysis of a Dual-Probe Scanning Tunneling Microscope Setup on Graphene

“…We employ the Tersoff-Hamann approach [46][47][48] to describe a structureless tip with only the end orbital of a linear atomic chain coupled to the sample. The DOS of the chain is constant in the considered energy range.…”

“…Experimental STM tips have finite radii of curvature, limiting the resolution due to couplings with multiple lattice sites. We employ the Tersoff-Hamann approach [44][45][46] to describe a structureless tip with only the end orbital of a linear atomic chain coupled to the sample. The DOS of the chain is constant in the considered energy range.…”

The Edge Current on Zigzag Graphene Nanoribbons

“…21,22) A multiprobe STM technique is also expected to be useful for measuring the electric conductance at an atomic scale, 23) and a theoretical calculation of the two terminal conductance of graphene was performed. 24) We consider zigzag GNRs connected to one-dimensional (1D) leads representing STM probes. Transport properties are investigated using the nonequilibrium Green's function (NEGF) method with a tight-binding scheme.…”