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We consider charged dilatonic black branes in AdS_5 and examine the effectsof perturbative higher derivative corrections on the ratio of shear viscosityto entropy density eta/s of the dual plasma. The structure of eta/s iscontrolled by the relative hierarchy between the two scales in the plasma, thetemperature and the chemical potential. In this model the backgroundnear-horizon geometry interpolates between a Lifshitz-like brane at lowtemperature, and an AdS brane at high temperatures -- with AdS asymptotics inboth cases. As a result, in this construction the viscosity to entropy ratioflows as a function of temperature, from a value in the IR which is sensitiveto the dynamical exponent z, to the simple result expected for an AdS brane inthe UV. Coupling the scalar directly to the higher derivative terms generatesadditional temperature dependence, and leads to a particularly interestingstructure for eta/s in the IR.

Generating Temperature Flow for eta/s with Higher Derivatives: From Lifshitz to AdS