Why Sliding Friction of Ne and Kr Monolayers Is So Different on the Pb(111) Surface
Artikel i vetenskaplig tidskrift, 2011

To understand the tribological properties of Ne and Kr on Pb(111), the potential energy surfaces for sliding motion of Ne, Kr, and Xe monolayers on the Pb(111) surface are examined through density functional calculations, using either local density or self-consistent nonlocal van der Waals functionals. The calculated adsorption energy for Xe/Pb(111) agrees well with experiment, validating the present approach and parameters. Activation energies along a sliding path indicate that Ne motion is much faster than Kr and Xe on Pb(111) at T similar to 6 K, which explains the puzzling experimental observation.

nanotribology

atomic-scale friction

Författare

Y. N. Zhang

F. Hanke

V. Bortolani

Mats Persson

Chalmers, Teknisk fysik, Material- och ytteori

R. Q. Wu

Physical Review Letters

0031-9007 (ISSN) 1079-7114 (eISSN)

Vol. 106 23

Ämneskategorier

Fysik

DOI

10.1103/PhysRevLett.106.236103