| Surface diffusion of Cr adatoms on Au(111) by quantum tunneling. | |
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MedLine Citation:
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PMID: 16383997 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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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:
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Type: Journal Article Date: 2005-11-01 |
Journal Detail:
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Title: Physical review letters Volume: 95 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2005 Nov |
Date Detail:
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Created Date: 2005-12-30 Completed Date: 2006-06-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 195901 Citation Subset: - |
Affiliation:
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Laboratoire pour l'Utilisation du Rayonnement Electromagnétique, UMR 130 CNRS-Université Paris Sud, 91898 Orsay, France. philippe.ohresser@synchrotron-soleil.fr |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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