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STS INVESTIGATIONS OF METALLIC NANOSTRUCTURES DEPOSITED ONBi2Te3

Author

Listed:
  • SZYMON WINIARZ

    (Institute of Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznan, Poland)

  • PIOTR BISKUPSKI

    (Institute of Physics, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland)

  • STANISLAW SZUBA

    (Institute of Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznan, Poland)

  • SLAWOMIR MIELCAREK

    (Institute of Physics, Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614 Poznan, Poland)

  • RYSZARD CZAJKA

    (Institute of Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznan, Poland)

Abstract

Bi2Te3has attracted attention due to its potential applications in the microfabrication of integrated thermoelectric devices. It is also interesting to study the metallization process of this compound. Metallic nanostructures were deposited by means of an electron gun evaporator in ultra high vacuum (UHV) conditions (10-8Pa) on the freshly cleaved 0001 surface of the crystalBi2Te3. Measurements were conducted using the commercially available Omicron UHV scanning tunneling microscope (STM). Scanning tunneling spectroscopy (STS) measurements were performed using current imaging tunneling spectroscopy (CITS), and subsequent calculation of thedI/dVmaps. Metallic characteristics were observed on nickel islands since early stages of the growth. CITS anddI/dVmaps showed distinct contrast between the substrate and metallic islands. Similar contrast was not observed in the case of titanium, most probably due to an intercalation process. Occurring of such a process was confirmed by the appearance of the superlattice structure.

Suggested Citation

  • Szymon Winiarz & Piotr Biskupski & Stanislaw Szuba & Slawomir Mielcarek & Ryszard Czajka, 2007. "STS INVESTIGATIONS OF METALLIC NANOSTRUCTURES DEPOSITED ONBi2Te3," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 14(03), pages 357-360.
    • Handle: RePEc:wsi:srlxxx:v:14:y:2007:i:03:n:s0218625x07009657
    DOI: 10.1142/S0218625X07009657
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