Island Shape Selection in Pt(111) Submonolayer Homoepitaxy with or without CO as an Adsorbate

Jing Wu, E. G. Wang, K. Varga, B. G. Liu, S. T. Pantelides, and Zhenyu Zhang
Phys. Rev. Lett. 89, 146103 – Published 16 September 2002

Abstract

The microscopic selection mechanisms of single-layer island shapes in Pt(111) homoepitaxy with or without minute amounts of CO adsorbate have been investigated theoretically. For clean growth, only triangular islands of a fixed orientation are obtained within a wide range of growth temperatures, with the orientation uniquely determined by a disparity in the rates of atom supply to an island corner site from the two island edges defining the corner. This novel picture is further corroborated by growth predictions in the presence of CO, whose preferential decoration of one type of the island edges reverses the intrinsic rate disparity for atom supply, thereby inverting the island orientation.

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  • Received 21 April 2000

DOI:https://doi.org/10.1103/PhysRevLett.89.146103

©2002 American Physical Society

Authors & Affiliations

Jing Wu1, E. G. Wang1,2, K. Varga3, B. G. Liu1, S. T. Pantelides3,4, and Zhenyu Zhang3,2

  • 1Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
  • 2International Center for Quantum Structures, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
  • 3Solid State Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6032
  • 4Department of Physics, Vanderbilt University, Nashville, Tennessee 37235

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Issue

Vol. 89, Iss. 14 — 30 September 2002

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