Phys. Rev. B 66, 035325 (2002) [5 pages]Quantized valence states of the Pb/Si(111) mosaic phaseReceived 13 February 2002; published 24 July 2002 The Pb/Si(111)-(√3×√3)R30° mosaic phase, whose surface consists of ≈1/6 ML of Pb and 1/6 ML of Si, has been studied by scanning tunneling spectroscopy. The top of the valence band consists of Pb 6pz derived states, which are quantized into a series of about four equally spaced, narrow peaks. The sharpness and regular ordering of these states is unexpected considering that the surface is chemically disordered, with no long-range order. The existence of these states is attributed to correlations in the short-range order, and is consistent with published calculations of one-dimensional systems. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.66.035325
DOI:
10.1103/PhysRevB.66.035325
PACS:
73.20.At, 68.37.Ef, 68.35.-p, 73.20.Hb
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