Scaling and universality in the kinetic smoothening of interfaces: Application to the analysis of the relaxation of rough vicinal steps of an oxide surface
CEA, IRAMIS, SPCSI - 91191 Gif-sur-Yvette, France, EU
Corresponding author: firstname.lastname@example.org
Accepted: 10 March 2010
Relaxation of initially out-of-equilibrium rough interfaces in the presence of thermal noise is investigated using Langevin formalism. During thermal equilibration towards the well-known roughening regime, three scaling regimes observed over three successive ranges of length-scales are evidenced: thermal roughening (late stage) at small scales, transient smoothening at intermediate scales and remnant of the initial conditions at large scales. A generalization of the Family-Vicsek scaling is found for the smoothening regime. This approach allows interpreting a series of AFM images of sapphire surfaces showing the thermal evolution of initially rough step edges.
PACS: 05.70.Np – Interface and surface thermodynamics / 64.60.Ht – Dynamic critical phenomena / 68.35.Ct – Interface structure and roughness
© EPLA, 2010