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Surface Reconstruction of Pt/Si(001)

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Abstract

Platinum-induced surface reconstructions on Si(001) were investigated by scanning tunneling microscopy. The Si(001) surface shows c(4×6)+c(4×2)-type reconstruction after Pt hot deposition at 750 °C. The c(4×2) reconstruction is formed by regular arrangement of Pt ad-atoms at the hollow sites between two Si dimers on Si(001). The c(4×6) structure is formed by long-range ordering of Si dimers superimposed on the c(4×2) reconstruction. The surface reconstruction changes with the local Pt coverage and missing dimer density. An atomic model for c(4×6)+c(4×2) is proposed based on the observed c(4×4) surface reconstruction, a new surface reconstruction, which is observed following a high-temperature anneal at 900 °C. The c(4×4) surface reconstruction is regular and ordered in both the dimer-row direction and the direction perpendicular to the dimer rows. The reconstruction is formed by the regular arrangement of Si dimers and Pt ad-atoms sitting on top of the hollow sites surrounded by two dimers. An atomic model for this new reconstruction is proposed.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Wisconsin, 1509 University Avenue, Madison, WI, 53706, USA

    C. Ji & Y.A. Chang

  2. Quantum Science Research, Hewlett-Packard Laboratories, 1501 Page Mill Road, MS 1123, Palo Alto, CA, 94304, USA

    R. Ragan, S. Kim, Y. Chen, D.A.A. Ohlberg & R. Stanley Williams

Authors
  1. C. Ji
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  2. R. Ragan
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  3. S. Kim
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  4. Y.A. Chang
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  5. Y. Chen
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  6. D.A.A. Ohlberg
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  7. R. Stanley Williams
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Corresponding author

Correspondence to Y.A. Chang.

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PACS

68.35.Bs; 68.37.Ef; 68.43.Fg

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Ji, C., Ragan, R., Kim, S. et al. Surface Reconstruction of Pt/Si(001). Appl. Phys. A 80, 1301–1304 (2005). https://doi.org/10.1007/s00339-004-3150-8

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  • DOI: https://doi.org/10.1007/s00339-004-3150-8

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