Step Patterns on Vicinal Reconstructed Surfaces

Details Step Patterns on Vicinal Reconstructed Surfaces Step Patterns on Vicinal Reconstructed Surfaces

1996-01-09

arxiv.org/abs/cond-mat/9601028v1

Physics

Condensed Matter

11 pages with 5 eps figures in text. Uses psfig and elsart.sty (ELSEVIER Science). To be published in Surf. Sci

Scientific paper

10.1016/0039-6028(95)01074-2

Step patterns on vicinal $(2\times1)$ reconstructed surfaces of noble metals Au(110) and Pt(110), miscut towards the (100) orientation, are investigated. The free energy of the reconstructed surface with a network of crossing opposite steps is calculated in the strong chirality regime when the steps cannot make overhangs. It is explained why the steps are not perpendicular to the direction of the miscut but form in equilibrium a network of crossing steps which make the surface to look like a fish skin. The network formation is the consequence of competition between the -- predominantly elastic -- energy loss and entropy gain. It is in agreement with recent scanning-tunnelling-microscopy observations on vicinal Au(110) and Pt(110) surfaces.

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