p(n×1) superstructures of Pb on Cu(110)

C. Nagl, M. Pinczolits, M. Schmid, P. Varga, and I. K. Robinson
Phys. Rev. B 52, 16796 – Published 15 December 1995
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Abstract

The structures of the p(n×1) superstructures (n=4, 5, and 9) of Pb on Cu(110) in the coverage range between FTHETA=0.75 and 0.8 are revealed by atomically resolved scanning tunneling microscopy. All three superstructures are formed by substitution of every nth row of Cu atoms (n=4, 5, and 9) in the [001] direction by Pb atoms. The Pb atoms in between are lined up in the [1¯10] direction. The p(4×1) structure appears in two different modifications: one with substitutional rows of Pb atoms and one with a simple overlayer structure without substituted rows of Cu atoms. Alternating succession of these two modifications results in p(12×1) domains. It is further shown that the p(9×1) structure is not a succession of p(4×1) and p(5×1) but a superstructure on its own. The p(5×1) structure proposed here agrees with previous x-ray-diffraction data at least as well as the quasihexagonal model proposed earlier. We have, in addition, identified the nature of the phase that has been described incommensurate obtained by desorption of Pb upon annealing above 600 K.

  • Received 28 June 1995

DOI:https://doi.org/10.1103/PhysRevB.52.16796

©1995 American Physical Society

Authors & Affiliations

C. Nagl, M. Pinczolits, M. Schmid, and P. Varga

  • Institut für Allgemeine Physik, Technische Universität Wien, A-1040 Wien, Austria

I. K. Robinson

  • Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

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Issue

Vol. 52, Iss. 23 — 15 December 1995

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