IDEAS home Printed from https://ideas.repec.org/a/wsi/srlxxx/v09y2002i05n06ns0218625x02004499.html
   My bibliography  Save this article

THE LOW COVERAGE PHASES OF PbON Ge(001): SCANNING TUNNELING MICROSCOPY AND FIRST PRINCIPLES

Author

Listed:
  • NOBORU TAKEUCHI

    (Centro de Ciencias de la Materia Condensada, Universidad Nacional Autónoma de México, Apartado Postal 2681, Ensenada, Baja California, 22800, Mexico)

  • G. FALKENBERG

    (II. Institut fur Experimentalphysick Universitat Hamburg, Luruper Chausse 149, D-22761, Hamburg, Germany)

  • R. L. JOHNSON

    (II. Institut fur Experimentalphysick Universitat Hamburg, Luruper Chausse 149, D-22761, Hamburg, Germany)

Abstract

Using scanning tunneling microscopy and first principles total energy calculations, we have studied the atomic structure of the low coverage phases of Pb on Ge(001): the(2 × 2)and thec(4 × 8)- αreconstructions. Based on the analysis of the experimental bias-dependent STM images and supported by theab initiopseudopotential density-functional calculations, we present models for each structure. In both cases, there is a coexistence of Ge and Pb dimers. The(2 × 2)phase is formed by asymmetric Pb dimers parallel and in the trenches between the underlying Ge dimers. The Pb coverage is 0.5 ML and it corresponds to the maximum packing density of Pb dimers without breaking Ge dimers. Thec(4 × 8) - αreconstruction has a Pb coverage of 0.75 ML and it is characterized by asymmetric Pb dimers forming chains along the [110] direction. However, in this case half of the Ge dimers are broken. The other half remain intact and they are perpendicular to the Pb dimers.

Suggested Citation

  • Noboru Takeuchi & G. Falkenberg & R. L. Johnson, 2002. "THE LOW COVERAGE PHASES OF PbON Ge(001): SCANNING TUNNELING MICROSCOPY AND FIRST PRINCIPLES," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 9(05n06), pages 1809-1814.
    • Handle: RePEc:wsi:srlxxx:v:09:y:2002:i:05n06:n:s0218625x02004499
    DOI: 10.1142/S0218625X02004499
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S0218625X02004499
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S0218625X02004499?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wsi:srlxxx:v:09:y:2002:i:05n06:n:s0218625x02004499. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Tai Tone Lim (email available below). General contact details of provider: http://www.worldscinet.com/srl/srl.shtml .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.