  A simple antiferromagnetic approach to the Mott transition was recently shown
to provide a satisfactory explanation for the Mott gap collapse with doping
observed in photoemission experiments on electron-doped cuprates. Here this
approach is extended in a number of ways. RPA, mode coupling (via
self-consistent renormalization), and (to a limited extent) self-consistent
Born approximation calculations are compared to assess the roles of hot-spot
fluctuations and interaction with spin waves. When fluctuations are included,
the calculation satisfies the Mermin-Wagner theorem, and the mean-field gap and
transition temperature are replaced by pseudogap and onset temperature. The
model is in excellent agreement with experiments on the doping dependence of
both photoemission dispersion and magnetic properties. The magnetic phase
terminates in a quantum critical point (QCP), with a natural phase boundary for
this QCP arising from hot-spot physics.
  Since the resulting T=0 antiferromagnetic transition is controlled by a
generalized Stoner factor, an ansatz is made of dividing the Stoner factor up
into a material-dependent part, the bare susceptibility and a
correlation-dependent part, the Hubbard U, which depends only weakly on doping.
  From the material dependent part of the interaction, it is possible to
explain the striking differences between electron- and hole-doping, despite an
approximate symmetry in the doping of the QCP. The slower divergence of the
magnetic correlation length in hole doped cuprates may be an indication of more
Mott-like physics.

Superconductivity;Strongly Correlated Electrons