UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Surface dynamics and friction of K/Cu(001) characterized by helium-3 spin-echo and density functional theory

Hedgeland, H; Kole, PR; Davies, HR; Jardine, AP; Alexandrowicz, G; Allison, W; Ellis, J; ... Brivio, GP; + view all (2009) Surface dynamics and friction of K/Cu(001) characterized by helium-3 spin-echo and density functional theory. Physical Review B - Condensed Matter and Materials Physics , 80 (12) 10.1103/PhysRevB.80.125426.

Full text not available from this repository.

Abstract

Helium-3 spin-echo measurements of K/Cu(001) are presented, the diffusional surface dynamics of the system at low coverages and on picosecond time scales. Langevin molecular-dynamics simulations are used, together with a potential-energy surface derived from density functional theory calculations, to provide further understanding of the experimental data. An anisotropic potential with a corrugation of 35-64 meV and a friction parameter of 1/4.5 ps-1 are found to give a good fit to the data for the lower coverages with the adsorbate interactions modeled with a dipole-dipole repulsion. Additionally, at the highest coverage, θ=0.084, a component of motion is observed perpendicular to the surface, analogous to that recently found for Na/Cu(001). © 2009 The American Physical Society.

Type: Article
Title: Surface dynamics and friction of K/Cu(001) characterized by helium-3 spin-echo and density functional theory
DOI: 10.1103/PhysRevB.80.125426
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1448098
Downloads since deposit
0Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item