arXiv subjects

Albert-László Barabási

Publications and source records attributed to Albert-László Barabási.

56 records · Page 4Linked to original sources

arXiv1993

Surfactant-Mediated Growth of Nonequilibrium Interfaces

A number of recent experiments have showed that surfactants can modify the growth mode of an epitaxial film, suppressing islanding and promoting layer-by-layer growth. Here I introduce a set of coupled equations to describe the nonequilibrium roughening of an interface covered with a thin surfactant layer. The surfactant may drive the system into a novel phase, in which the surface roughness is negative, corresponding to a flat surface.

cond-mat↗

arXiv1992

Dynamic Scaling of Coupled Nonequilibrium Interfaces

We propose a simple discrete model to study the nonequilibrium fluctuations of two locally coupled 1+1 dimensional systems (interfaces). Measuring numerically the tilt-dependent velocity we construct a set of stochastic continuum equations describing the fluctuations in the model The scaling predicted by the equations are studied analytically using dynamic renormalization group and compared with simulation results. When the coupling is symmetric, the well known KPZ exponents are recovered. If one of the systems is fluctuating independently, an increase in the roughness exponent is observed for the other one.

cond-mat↗