MEASUREMENT OF THE DISPERSION CURVES OF SURFACE VIBRATIONS ON Ni (100) AND Ni (100) C (2x2) O BY ELECTRON ENERGY LOSS SPECTROSCOPY

S. Szeftel , S. Lehwald , H. Ibach

The dispersion curves of several surface vibrations have been measured throughout the two-dimensional Brillouin zone in the direction (110) on Ni (100) and Ni (100) C (2x2) O. The Rayleigh phonon has been observed on both systems. Besides a resonance and two O-vibrations associated with motions perpendicular and parallel to the surface have been observed on Ni (100) C (2x2) O. Those results are discussed within the framework of a simple model of the lattice dynamics, which yields information upon surface relaxation and the Ni-O distance.

Domaines: Articles anciens

S. Szeftel, S. Lehwald, H. Ibach. MEASUREMENT OF THE DISPERSION CURVES OF SURFACE VIBRATIONS ON Ni (100) AND Ni (100) C (2x2) O BY ELECTRON ENERGY LOSS SPECTROSCOPY. Journal de Physique Colloques, 1984, 45 (C5), pp.C5-109-C5-112. ⟨10.1051/jphyscol:1984515⟩. ⟨jpa-00224133⟩