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

Dietmar C. Schlößer, Laurens K. Verheij, G. Rosenfeld, George Comsa

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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.
Original languageUndefined
Pages (from-to)3843-3846
Number of pages4
JournalPhysical review letters
Issue number82
Publication statusPublished - 1999


  • IR-61224
  • METIS-128690

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