  The cobaltates have demonstrated a wide variety complex behavior. The Na rich
region of the phase diagram displays various degrees of anomalous behavior,
such as Curie-Weiss behavior near a band insulator\cite{Foo:2004}, charge
disproportionation\cite{Mukhamedshin:2005}, and non-Fermi-liquid behavior in
the resistivity\cite{Foo:2004}. Alternatively, the Na poor region of the phase
diagram appears to be a Fermi-liquid. The magnetic susceptibility displays
Pauli behavior, the resistivity is roughly quadratic at low
temperatures\cite{Foo:2004}, and the system appears to be
homogeneous\cite{Mukhamedshin:2005}. Therefore, the Na poor region of the phase
diagram seems like a natural starting point to attempt to explain the ARPES
experiments and heat capacity measurements from a quantitative standpoint.
