BREAKDOWN OF SIMPLE SCALING IN ABELIAN SANDPILE MODELS IN ONE-DIMENSION

We study the Abelian sandpile model on decorated one-dimensional chains. We determine the structure and the asymptotic form of distribution of avalanche sizes in these models, and show that these differ qualitatively from the behavior on a simple linear chain. We find that the probability distribution of the total number of topplings s on a finite system of size L is not described by a simple finite-size scaling form, but by a linear combination of two simple scaling forms ProbL(s)=(1/L)f1(s/L)+(1/L2)f2(s/L2), for large L, where f1 and f2 are some scaling functions of one argument.