  The random sequential adsorption (RSA) model is a classical model in
Statistical Physics for adsorption on two-dimensional surfaces. Objects are
deposited sequentially at random and adsorb irreversibly on the landing site,
provided that they do not overlap any previously adsorbed object. The kinetics
of adsorption ceases when no more objects can be adsorbed (jamming state).
Here, we investigate the role of post-relaxation on the jamming state and
percolation properties of RSA of dimers on a two-dimensional lattice. We
consider that, if the deposited dimer partially overlaps with a previously
adsorbed one, a sequence of dimer displacements may occur to accommodate the
new dimer. The introduction of this simple relaxation dynamics leads to a more
dense jamming state than the one obtained with RSA without relaxation. We also
consider the anisotropic case, where one dimer orientation is favored over the
other, finding a non-monotonic dependence of the jamming coverage on the
strength of anisotropy. We find that the density of adsorbed dimers at which
percolation occurs is reduced with relaxation, but the value depends on the
strength of anisotropy.
