  We study the extended Hubbard model with both on-site and nearest neighbor
Coulomb repulsion ($U$ and $V$, respectively) in the Dynamical Mean Field
theory. At quarter filling, the model shows a transition to a charge ordered
phase with different sublattice occupancies $n_A \nen_B$. The effective mass
increases drastically at the critical $V$ and a pseudo-gap opens in the
single-particle spectral function for higher values of $V$. The $V_c(T)$-curve
has a negative slope for small temperatures, i.e. the charge ordering
transition can be driven by increasing the temperature. This is due to the
higher spin-entropy of the charge ordered phase.
