Stiffening Transition in Vicinal Surfaces with Adsorption

Details Stiffening Transition in Vicinal Surfaces with Adsorption Stiffening Transition in Vicinal Surfaces with Adsorption

1999-03-31

arxiv.org/abs/cond-mat/9903448v2

Physics

Condensed Matter

Statistical Mechanics

PTPTEX 6 pages, 3 figures

Scientific paper

We study the vicinal surface with adsorption below the roughening temperature, using the restricted solid-on-solid model coupled with the Ising model. We calculate the step tension $\gamma$ and the step-interaction coefficient $B$ by employing a variant of the density matrix algorithm. We find a ``stiffening transition'' at a temperature $T_{\rm s}$ where $B$ vanishes. At $T_{\rm s}$ surface free energy has the form $f(p)- f(0)= \gamma p + ({const.})p^5 + ...$ ($p$: surface gradient), which differs from the well-known $p$-$p^3$ form.

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