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Journal Article

Two-dimensional roughening of adsorbate islands in thermodynamic equilibrium

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Wintterlin,  Joost
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Trost,  Johannes
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Schuster,  Rolf
Physical Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

Wintterlin, J., Trost, J., Schuster, R., Eichler, A., & McEwen, J.-S. (2006). Two-dimensional roughening of adsorbate islands in thermodynamic equilibrium. Physical Review Letters, 96(16), 166102–1-166102–4. doi:10.1103/PhysRevLett.96.166102.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0011-04B3-4
Abstract
Equilibrium fluctuations of islands of adsorbed O atoms on Ru(0001) were investigated by scanning tunneling microscopy (STM), density functional theory calculations (DFT) and Monte Carlo (MC) simulations. Very ramified (2x2)-O islands were observed by high-speed STM that point to complex interactions between the O atoms. The DFT calculations show that, in addition to pairwise attractive interactions between third-nearest neighbors, a repulsive three-body interaction exists between these. MC simulations that include three-body interactions reproduce the observed ordering behavior.