title: Fluctuations of self-flattening surfaces.
abstract: We study the scaling properties of self-flattening surfaces under global suppression on surface fluctuations. Evolution of self-flattening surfaces is described by restricted solid-on-solid type monomer deposition-evaporation model with reduced deposition (evaporation) at the globally highest (lowest) site. We find numerically that equilibrium surface fluctuations are anomalous with roughness exponent alpha approximately equal to 1/3 and dynamic exponent z(W) approximately equal to 3/2 in one dimension (1D) and alpha=0 (log) and z(W) approximately 5/2 in 2D. Stationary roughness can be understood analytically by relating our model to the static self-attracting random walk model and the dissociative dimer-type deposition-evaporation model. In case of nonequilibrium growing-eroding surfaces, self-flattening dynamics turns out to be irrelevant and the normal Kardar-Parisi-Zhang universality is recovered in all dimensions.
authors.affiliation: Department of Physics and Research Institute of Basic Sciences, Kyung Hee University, Seoul 130-701, Korea.
authors.forename: Yup
authors.initials: Y
authors.lastname: Kim
authors.forename: S Y
authors.initials: SY
authors.lastname: Yoon
authors.forename: Hyunggyu
authors.initials: H
authors.lastname: Park