Abstract
The thermal flattening of a sinusoidally grooved surface described by the discrete Gaussian model is studied using Monte Carlo techniques. An exponential decay of the amplitude of undulations is found both above and below the roughening transition temperature, T R, for particle transport by evaporation-condensation with and without conserving the number of surface atoms. The characteristic relaxation time changes rapidly close to T R. Below T R, trapezoidal profiles are observed.
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