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The Rayleigh phonon dispersion on Cu(100): A stress induced frequency shift?

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Zeitschrift für Physik B Condensed Matter

Abstract

The dispersion of the Rayleigh wave on Cu(100) has been measured by high resolution electron energy loss spectroscopy (EELS) throughout the two-dimensional Brillouin zone in the\(\overline {\Gamma M} {\text{ - direction}}\). The experimental data can be matched with a nearest neighbour central force model when the force constant between the first and second layerk 12 is stiffened by 20%. However, the data are likewise explained by assuming stress within the surface layer. The stress could arise from a tendency of the surface layer to contract.

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Authors and Affiliations

  1. Institut für Grenzflächenforschung und Vakuumphysik, Kernforschungsanlage Jülich, Postfach 1913, D-5170, Jülich 1, Germany

    M. Wuttig, R. Franchy & H. Ibach

Authors
  1. M. Wuttig
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  2. R. Franchy
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  3. H. Ibach
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Wuttig, M., Franchy, R. & Ibach, H. The Rayleigh phonon dispersion on Cu(100): A stress induced frequency shift?. Z. Physik B - Condensed Matter 65, 71–74 (1986). https://doi.org/10.1007/BF01308401

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  • DOI: https://doi.org/10.1007/BF01308401

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