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Published online by Cambridge University Press: 10 February 2011
A Molecular Dynamics simulation method has been applied to the motion of steps on a surface vicinal to {100}in Si. Undulation of the steps and ‘kissing sites’ are observed to arise from thermal fluctuations at 300°K. The dependence of the characteristic energy of these configurations on the terrace width complies with a free fermion picture which also includes dipolar and nearest neighbours interactions.