  We study holographic phase transitions in (2+1) dimensions that possess
interacting phases which result from a direct coupling between the two U(1)
gauge fields. This can be interpreted as a non-minimal interaction between the
electric and spin motive forces of the dual model. We first present a new
analytical solution of the Einstein-Maxwell equations that describes a black
hole with charge non-equivalent to the sum of the asymptotic charges of the two
U(1) gauge fields and briefly discuss formation of uncharged scalar hair on
this solution. We then study the formation of charged scalar hair on an
uncharged black hole background and discuss the dual description of balanced as
well as unbalanced superconductors.
