Dynamics of a 2D liquid on a periodic substrate: Rb in graphite

Publisher Website
Google Scholar
Abstract
We present a molecular-dynamics simulation of the dynamical properties of a 2D Rb liquid intercalated in a periodic graphite host. Using an 864-atom system we show that this dynamical response consists of both solid and liquid features well above the melting point, as indicated in the neutron experiments of Zabel and co-workers, and may be characterized by floating (time-dependent) domains of briefly registered ions which, during their ∼26-ps lifetime, show phononlike behavior and a Debye-Waller factor in excellent agreement with the experiments of Kamitakahara and Zabel.