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figureposted on 11.10.2017 by Ben Warner, Toby Gill, Cyrus Hirjibehedin
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Comparison of the electronic contrast observed in
experimental (i)-(iv), and simulated (v)-(viii) STM images obtained at +1.0 V, +0.5 V, +0.1
V, and -1.0 V (3.15 nm x 3.15 nm, Iset = 50 pA). Close to the Fermi level, the Si ‘up’ atoms of
the domain boundary are brighter than those in the domain center; far from the Fermi level, all
of the Si atoms have a more uniform appearance and the domain boundaries appear as dark
lines. The simulated constant current STM images correspond to charge density iso-surfaces
of 5 x 10-7 electrons/Å3.