Electronic Resource
Springer
The European physical journal
64 (1986), S. 453-459
ISSN:
1434-6036
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The Cu(100) surface covered with atomic nitrogen has been studied with low energy electron diffraction (LEED), Auger electron spectroscopy (AES) and inelastic electron scattering (EELS). Atomic nitrogen, formed by thermal dissociation of NH3 adsorbed at 100 K, forms a c(2×2) overlayer on the Cu(100) surface. The dispersion of adsorbate and substrate associated modes of the Cu(100) surface covered with a c(2×2) nitrogen overlayer has been measured along the two dimensional Brillouin zone in the $$\bar \Gamma \bar X$$ - by inelastic electron scattering. The experimental data are compared to a lattice dynamical slab calculation. The Rayleigh-mode (S4-phonon) is only slightly changed by the N-overlayer. An optimum fit for the perpendicular and parallel nitrogen modes (ω⊥=320 cm−1 and ω‖=740 cm−1 at ζ‖=0.1) is obtained when the nitrogen atom is placed 0.6 Å above the first copper layer.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01312839
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