  The velocity autocorrelation function (VAF) for a two-dimensional
one-component plasma (OCP) is investigated by employing molecular dynamics
techniques. The VAF exhibits well defined oscillations whose frequency is
independent of the dimensionless coupling parameter Gamma. However, the
presence of a uniform perpendicular external magnetic field increases the
height of the first peak. Molecular dynamics computer simulation results are
presented for a two-dimensional OCP in a perpendicular magnetic field as a
function of the Plasma parameter. Our simulation results clearly indicate that
at high temperature, the magnetic field affects the VAF in a substantial way.
