  The phase diagrams at high temperature of SU(N) gauge theories with massive
fermions are calculated by numerically minimizing the one-loop effective
potential. We consider fermions in the Fundamental (F), Adjoint (Adj),
Antisymmetric (AS), and Symmetric (S) representations, for N from 3 to 9, with
periodic and antiperiodic boundary conditions applied. For one flavour of AS/S
(Dirac) fermion with periodic boundary conditions the C-breaking phase is
favoured perturbatively for all values of the fermion mass. In the case of one
flavour of adjoint Majorana fermion, and periodic boundary conditons, the
deconfined phase is favoured for any fermion mass. For one or more adjoint
Dirac fermion (two or more Majorana fermions) we find partially-confining
phases as well as new phases with unusual properties. Our results for SU(3) and
SU(4) are consistent with our lattice simulations of a related model.
