Scaling properties of deconstruction interfaces in disordered media

The scaling properties of interfaces generated by a disaggregation model in 1+1 dimensions are studied by numerical simulations. The model presented h ere for the dis aggregation process takes into account the possibility of h aving quenched disorder in the bulk under deconstruction. The disorder can be considered to model several types of irregularities appearing in real ma terials (dislocations, impurities). The presence of irregularities makes th e intensity of the attack to be not uniform. In order to include this effec t, the computational bulk is considered to be composed by two types of part icles: those particles which can be easily detached and other particles tha t are not sensible to the etching attack. As the detachment of particles pr oceeds in time, the dynamical properties of the rough interface are studied . The resulting one-dimensional surface show self-affine properties and the values of the scaling exponents are reported when the interface is still m oving near the depinning transition. According to the scaling exponents pre sented here, the model must be considered to belong to a new universality c lass.