(click for full image)
Dual bias images of the 5x5 and 6x4 reconstructions. The average height difference between the two reconstructions is 0.3 Å for empty states (+1.0 V sample voltage) shown in (a) and 0.4 Å for filled states (-1.0 V sample voltage) shown in (b), with the 5x5 being higher in each case. In both images the total gray scale range is about 1.3 Å. (From [36]).
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