Free energy and stiffness of <110> and <010> steps on a (001) surface of a cubic lattrice: Revival of the solid-on-solid model

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Zandvliet, Harold J.W. and Moere van, Ronny and Poelsema, Bene (2003) Free energy and stiffness of <110> and <010> steps on a (001) surface of a cubic lattrice: Revival of the solid-on-solid model. Physical Review B: Condensed matter and materials physics, 68 (7). 073404. ISSN 1098-0121

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Abstract:We have determined the stiffness and free energy of <110> and <010> oriented steps on a (001) surface of a cubic lattice within the framework of a solid-on-solid model having nearest-neighbor (NN) and next-nearest-neighbor (NNN) interactions. The stiffness of <110> oriented steps depends on both the strength of the NN and NNN interactions, whereas the stiffness of the <010> oriented steps only depends on the NNN interaction. For a vanishing NNN interaction the dimensionless inverse stiffness of the <010> oriented steps reduces to the universal value of 1/[square root of 2] as obtained by the Ising model. As an example we apply this solid-on-solid model to the well-studied Cu(001) surface.
Item Type:Article
Copyright:© 2003 The American Physical Society
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Science and Technology (TNW)
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Link to this item:http://purl.utwente.nl/publications/40725
Official URL:http://dx.doi.org/10.1103/PhysRevB.68.073404
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Metis ID: 214143