title: Generalized Chudley-Elliott vibration-jump model in activated atom surface diffusion.
abstract: Here the authors provide a generalized Chudley-Elliott expression for the activated atom surface diffusion which takes into account the coupling between both low-frequency vibrational motion (namely, the frustrated translational modes) and diffusion. This expression is derived within the Gaussian approximation framework for the intermediate scattering function at low coverage. Moreover, inelastic contributions (arising from creation and annihilation processes) to the full width at half maximum of the quasielastic peak are also obtained.
authors.affiliation: Lehrstuhl für Physikalische Chemie I, Ruhr-Universität Bochum, D-44801 Bochum, Germany. ruth@imaff.cfmac.csic.es
authors.forename: R
authors.initials: R
authors.lastname: Martínez-Casado
authors.forename: J L
authors.initials: JL
authors.lastname: Vega
authors.forename: A S
authors.initials: AS
authors.lastname: Sanz
authors.forename: S
authors.initials: S
authors.lastname: Miret-Artés