Document Detail

Surface diffusion of Cr adatoms on Au(111) by quantum tunneling.
MedLine Citation:
PMID:  16383997     Owner:  NLM     Status:  PubMed-not-MEDLINE    
The low-temperature surface diffusion of isolated Cr adatoms on Au(111) has been determined using nonperturbing x rays. Changes in the x-ray magnetic circular dichroism spectral line shape together with Monte Carlo calculations demonstrate that adatom nucleation proceeds via quantum tunneling diffusion rather than over-barrier hopping for temperatures <40K. The jump rates are shown to be as much as 35 orders of magnitude higher than that expected for thermal over-barrier hopping at 10 K.
P Ohresser; H Bulou; S S Dhesi; C Boeglin; B Lazarovits; E Gaudry; I Chado; J Faerber; F Scheurer
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Publication Detail:
Type:  Journal Article     Date:  2005-11-01
Journal Detail:
Title:  Physical review letters     Volume:  95     ISSN:  0031-9007     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2005 Nov 
Date Detail:
Created Date:  2005-12-30     Completed Date:  2006-06-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  195901     Citation Subset:  -    
Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, UMR 130 CNRS-Université Paris Sud, 91898 Orsay, France.
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