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SURFACE PHONONS IN THE ORDEREDc(2 × 2) PHASE OFPdONAu(100)

Author

Listed:
  • R. CHADLI

    (Laboratoire de Physique et Chimie Quantique, Université Mouloud Mammeri, B. P. 17, Tizi-Ouzou 15000, Algérie)

  • A. KHATER

    (Laboratoire de Physique de l'Etat Condensé, Université du Maine, Av. Olivier Messiaen, Cedex 09, Le Mans 72085, France)

  • R. TIGRINE

    (Laboratoire de Physique et Chimie Quantique, Université Mouloud Mammeri, B. P. 17, Tizi-Ouzou 15000, Algérie)

Abstract

The vibrational properties of theAu(100)-c(2 × 2)-Pdordered phase, which is a stable system in the temperature range of 500 K to 600 K, are presented. This surface alloy is formed by depositingPdatoms onto theAu(100)surface, and annealing at higher temperatures. The equilibrium structural characteristics, phonon dispersions as well as the local density of phonon states are calculated using the matching theory associated with Green's function formalism evaluated in the harmonic approximation. New surface modes have been found on the ordered metallic surface alloy along the three directions of high symmetry$\overline{\Gamma X}$,$\overline{XM}$, and$\overline{M\Gamma}$, in comparison with the clean surfaceAu(100). Three of them are observed above the bulk bands spectrum.

Suggested Citation

  • R. Chadli & A. Khater & R. Tigrine, 2013. "SURFACE PHONONS IN THE ORDEREDc(2 × 2) PHASE OFPdONAu(100)," Surface Review and Letters (SRL), World Scientific Publishing Co. Pte. Ltd., vol. 20(02), pages 1-8.
    • Handle: RePEc:wsi:srlxxx:v:20:y:2013:i:02:n:s0218625x13500194
    DOI: 10.1142/S0218625X13500194
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