IDEAS home Printed from https://ideas.repec.org/a/eee/phsmap/v258y1998i1p123-139.html
   My bibliography  Save this article

Competition between ordering and heterogeneity effects on surface diffusion

Author

Listed:
  • Nieto, F.
  • Uebing, C.

Abstract

Tracer and collective diffusion of repulsively interacting particles adsorbed on a bivariate trap surface are studied by means of Monte Carlo modelling. Adsorption isotherms are obtained via simulations in the grand-canonical ensemble. Simulations in the canonical ensemble are used to mimick surface diffusion and to calculate the tracer, jump and chemical diffusion coefficients. The latter is determined utilizing the fluctuation and Kubo–Green methods. Both methods are in good agreement at high temperatures, but produce significantly different results at low temperatures where the repulsive nearest-neighbor interaction favors c(2×2) ordering of the adatoms. These discrepancies are discussed and explained. The effects of both the heterogeneities and the ad–ad interactions on surface diffusion are prominent at low temperatures. The existence of heterogeneities disturbs c(2×2) ordering at θ=0.5. It is shown that this breakdown of the order substantially affects surface diffusion.

Suggested Citation

  • Nieto, F. & Uebing, C., 1998. "Competition between ordering and heterogeneity effects on surface diffusion," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 258(1), pages 123-139.
    • Handle: RePEc:eee:phsmap:v:258:y:1998:i:1:p:123-139
    DOI: 10.1016/S0378-4371(98)00219-2
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0378437198002192
    Download Restriction: Full text for ScienceDirect subscribers only. Journal offers the option of making the article available online on Science direct for a fee of $3,000
    File URL: https://libkey.io/10.1016/S0378-4371(98)00219-2?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.

    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:eee:phsmap:v:258:y:1998:i:1:p:123-139. 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: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/physica-a-statistical-mechpplications/ .

    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.