Phys. Rev. Lett. 80, 3582–3585 (1998)Oscillatory Nonmetal-Metal Transitions of Ultrathin Sb Overlayers on a GaAs(110) Substrate
See accompanying Physics Focus Based on first-principles calculations, an Sb film on GaAs(110) is found to be nonmetallic at 1 and 3 monolayer (ML) coverages, and metallic at 2, 4, and higher ML coverages. These unusual oscillatory nonmetal-metal transitions are explained in terms of a generalized Wilson rule, constrained by the relative magnitudes of the separation and width of the subbands derived from the quantum-well states. The present study also establishes the existence of magic stability of the film at the odd numbers of monolayers, and strong interlayer spacing oscillations. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.80.3582
DOI:
10.1103/PhysRevLett.80.3582
PACS:
73.50.-h, 68.55.-a, 68.60.-p
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