  We examine magnetotransport in a holographic Dirac-Born-Infeld model, taking
into account the effects of backreaction on the geometry. The theory we
consider includes axionic scalars, introduced to break translational symmetry
and generate momentum dissipation. The generic structure of the DC conductivity
matrix for these theories is extremely rich, and is significantly more complex
than that obtained in the probe approximation. We find new classes of black
brane solutions, including geometries that exhibit Lifshitz scaling and
hyperscaling violation, and examine their implications on the transport
properties of the system. Depending on the choice of theory parameters, these
backgrounds can lead to metallic or insulating behavior. Negative
magnetoresistance is observed in a family of dynoic solutions. Some of the new
backreacted geometries also support magnetic-field-induced metal-insulator
transitions.
