Effects of biased diffusions on dynamical surface structures for the A+B-->0 reaction.
The dynamical scaling property of surface eroded by a chemical reaction A+B-->0 is studied by the simulation. To consider the effect of interactions between an A particle and the material which consists of B particles, the A particle is assumed to undergo a drifted-diffusive motion or a biased random walk before it touches the material. The surface of the material is eroded by the chemical reaction with a B particle which the A particle first encounters. In dimension d=2, we found three regimes in the dynamical surface structure. When there is attractive bias to the material, the dynamical scaling property belongs to the universality class with the dynamic exponent z=2. When there is no bias or relatively small repulsive bias, the scaling property belongs to the class with z=1. The surface roughening behavior disappears when repulsive bias becomes quite large. We also discuss the properties of the crossover between the existing regimes.