Avoided crossing of vibrational modes in Ag(110) observed by He time-of-flight measurements
- 15 August 1987
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 36 (5) , 2928-2930
- https://doi.org/10.1103/physrevb.36.2928
Abstract
The phonon spectrum of the Ag(110) surface along the direction is studied by He inelastic scattering with time-of-flight detection. The Rayleigh mode and two surface vibrational resonances are described up to the surface Brillouin-zone boundary. The dispersion curves of the resonances show the avoided crossing behavior predicted but never observed for the (110) surfaces of fcc metals. Surface lattice-dynamics calculations using a simple central nearest-neighbor forceconstant model are performed and found to be in close agreement with the experiment.
Keywords
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