Abstract
Molecular dynamics simulations of C60 on Au(111) reveal that the molecular diffusion consists of random sequences of stick, slide, and stick and slip periods. Stochastic analysis of forty trajectories shows that initially C60 follows a superdiffusive-sub-ballistic-like motion, which then turns into super-diffusive. Individual trajectories present a variety of diffusive motions that even include subdiffusion. The analysis of the displacement moments indicates Fractional Brownian motion (FBM), as underlying stochastic mechanism, a finding further supported by the analysis of the velocity correlation function.
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