Quantum Markovian activated surface diffusion of interacting adsorbates

Abstract

A quantum Markovian activated atom-surface diffusion model with interacting adsorbates is proposed for the intermediate scattering function, which is shown to be complex-valued and factorizable into a classical-like and a quantum-mechanical factor. Applications to the diffusion of Na atoms on flat (weakly corrugated) and corrugated-Cu(001) surfaces at different coverages and surface temperatures are analyzed. Quantum effects are relevant to diffusion at low surface temperatures and coverages even for relatively heavy particles, such as Na atoms, where transport by tunneling is absent.

6 pages, 4 figures

References in corpus (3)

• Line Shape Broadening in Surface Diffusion of Interacting Adsorbates with Quasielastic He Atom Scattering
• Quasielastic He atom scattering from surfaces: A stochastic description of the dynamics of interacting adsorbates
• Stochastic theory of lineshape broadening in quasielastic He atom scattering with interacting adsorbates