Holographic hydrodynamics of tilted Dirac materials

We present a gravity dual to quantum material with tilted Dirac cone in 2+1 dimensional spacetime. In this many-body system the electronics degrees of freedom are strongly-coupled, constitute fluid and admit an effective hydrodynamic description. The holographic techniques applied compute thermodynamic variables transports on boundary asymptotically anti de Sitter spacetime boosted black hole bulk. find that these materials exhibit deviations from normal which rely tilt cone. particular, shear viscosity entropy density ratio is reduced KSS bound violated system. This prediction can be experimentally verified two-dimensional ({\it e.g.} organic $\alpha$-({BEDT}-{TTF})$_2$I$_3$ $8Pmmn$ borophene)