Site determination and thermally assisted tunneling in homogenous nucleation

Preprint

11 September 2003

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/0309288

Abstract

A combined low-temperature scanning tunneling microscopy and density functional theory study on the binding and diffusion of copper monomers, dimers, and trimers adsorbed on Cu(111) is presented. Whereas atoms in trimers are found in fcc sites only, monomers as well as atoms in dimers can occupy the stable fcc as well as the metastable hcp site. In fact the dimer fcc-hcp configuration was found to be only 1.3 meV less favorable with respect to the fcc-fcc configuration. This enables a confined intra-cell dimer motion, which at temperatures below 5 K is dominated by thermally assisted tunneling.

Keywords

THERMALLY ASSISTED TUNNELING
DENSITY FUNCTIONAL THEORY
METASTABLE
TUNNELING
COPPER
DIMER
FCC
HCP

All Related Versions

Version 1, 2003-09-11, ArXiv
Published version: Physical Review Letters, 91 (20), 206102.

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