Random sequential adsorption of straight rigid rods on a simple cubic lattice

Random sequential adsorption of straight rigid rods of length $k$ ($k$-mers) on a simple cubic lattice has been studied by numerical simulations and finite-size scaling analysis. The calculations were performed by using a new theoretical scheme, whose accuracy was verified by comparison with rigorous analytical data. The results, obtained for \textit{k} ranging from 2 to 64, revealed that (i) in the case of dimers ($k=2$), the jamming coverage is $θ_j=0.918388(16)$. Our estimate of $θ_j$ differs significantly from the previously reported value of $θ_j=0.799(2)$ [Y. Y. Tarasevich and V. A. Cherkasova, Eur. Phys. J. B \textbf{60}, 97 (2007)]; (ii) $θ_j$ exhibits a decreasing function when it is plotted in terms of the $k$-mer size, being $θ_j (\infty)= 0.4045(19)$ the value of the limit coverage for large $k$'s; and (iii) the ratio between percolation threshold and jamming coverage shows a non-universal behavior, monotonically decreasing with increasing $k$.

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