  We present studies of the potential energy landscape of selected binary
Lennard-Jones thirteen atom clusters. The effect of adding selected impurity
atoms to a homogeneous cluster is explored. We analyze the energy landscapes of
the studied systems using disconnectivity graphs. The required inherent
structures and transition states for the construction of disconnectivity graphs
are found by combination of conjugate gradient and eigenvector-following
methods. We show that it is possible to controllably induce new structures as
well as reorder and stabilize existing structures that are characteristic of
higher-lying minima. Moreover, it is shown that the selected structures can
have experimentally relevant lifetimes.
