Phys. Rev. Lett. 55, 2028–2031 (1985)Tunneling Images of Atomic Steps on the Si(111)7×7 SurfaceReceived 11 July 1985; published in the issue dated 4 November 1985 Tunneling images of single atomic steps on Si(111) have been obtained with a tunneling microscope. The 7×7 reconstruction is observed to persist essentially undistorted right up to the steps. The position of each step coincides with a 7×7 unit-mesh edge in both the upper and lower terraces adjacent to it. Asymmetry within the 7×7 unit mesh is observed and correlated with faulting of terraces adjacent to the step. The results are described by an extension of the dimer adatom stacking-fault model of Takayanagi et al. © 1985 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.55.2028
DOI:
10.1103/PhysRevLett.55.2028
PACS:
68.20.+t
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