IDEAS home Printed from https://ideas.repec.org/a/wsi/srlxxx/v05y1998i03n04ns0218625x98001201.html
   My bibliography  Save this article

Prefactor and Step Edge Barrier Determination for Initerlayer Diffusion in Homoepitaxial Systems: Ag/Ag(111)

Author

Listed:
  • K. R. Roos

    (Department of Physics, Bradley University, Peoria, IL 61625, USA)

  • M. C. Tringides

    (Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011, USA)

Abstract

Interlayer diffusion is controlled by the probability that an atom will hop from a higher to a lower level. This probability depends on the additional step edge barrierΔEswhich an atom experiences at a step because of the lower coordination as it moves over the barrier, and possibly on the different prefactorsνs,νtfor an atom at the step versus one at a terrace position. It is important to develop experimental methods that separate out the two contributions. We have reanalyzed the STM-based method,1which measures the fraction of islands with second layer occupation at different deposition temperatures, to show how the two contributions can be identified. In addition, we have developed a diffraction-based method that measures the step density of nucleated islands as they compete for atom capture with the steps at the perimeter of the terraces. RHEED experiments on Ag/Ag(111) result inΔEs=0.15±0.03eV andνs/νt=2.3×102±0.2, in good agreement with the results,ΔEs=0.13±0.03eV andνs/νt=103±0.3, deduced from the data of Ref. 1.

Suggested Citation

  • K. R. Roos & M. C. Tringides, 1998. "Prefactor and Step Edge Barrier Determination for Initerlayer Diffusion in Homoepitaxial Systems: Ag/Ag(111)," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 5(03n04), pages 833-840.
    • Handle: RePEc:wsi:srlxxx:v:05:y:1998:i:03n04:n:s0218625x98001201
    DOI: 10.1142/S0218625X98001201
    as

    Download full text from publisher

    File URL: http://www.worldscientific.com/doi/abs/10.1142/S0218625X98001201
    Download Restriction: Access to full text is restricted to subscribers
    File URL: https://libkey.io/10.1142/S0218625X98001201?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:05:y:1998:i:03n04:n:s0218625x98001201. 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.