Determination of Step Free Energies from Island Shape Fluctuations on Metal Surfaces

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Schlößer, Dietmar C. and Verheij, Laurens K. and Rosenfeld, Georg and Comsa, George (1999) Determination of Step Free Energies from Island Shape Fluctuations on Metal Surfaces. Physical Review Letters, 82 (19). pp. 3843-3846. ISSN 0031-9007

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Abstract:The absolute measurement of free energies associated with crystal steps on a metal surface has been a long-standing problem. We report a reliable estimate of the step free energy on a Cu(111) crystal surface, based on an analysis of island shape fluctuations directly imaged by scanning tunneling microscopy. The result of 0.22 eV per atomic distance for steps running into close-packed directions is in good agreement with theoretical predictions.
Item Type:Article
Copyright:© 1999 The American Physical Society
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Link to this item:http://purl.utwente.nl/publications/61224
Official URL:http://dx.doi.org/10.1103/PhysRevLett.82.3843
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Metis ID: 128690