%0 Journal Article
%J Physical Review Letters
%D 2009
%T Graphene: A Nearly Perfect Fluid
%A Muller, M.
%A Schmalian, J.
%A Fritz, L.
%K critical-points
%K fermi-liquid behavior
%K gas
%K systems
%M ISI:000267887800032
%P 025301
%R 10.1103/Physrevlett.103.025301
%U ://000267887800032
%V 103
%X Hydrodynamics and collision-dominated transport are crucial to understand the slow dynamics of many correlated quantum liquids. The ratio eta/s of the shear viscosity eta to the entropy density s is uniquely suited to determine how strongly the excitations in a quantum fluid interact. We determine eta/s in clean undoped graphene using a quantum kinetic theory. As a result of the quantum criticality of this system the ratio is smaller than in many other correlated quantum liquids and, interestingly, comes close to a lower bound conjectured in the context of the quark gluon plasma. We discuss possible consequences of the low viscosity, including preturbulent current flow.
%Z 469HTTimes Cited:0Cited References Count:36
%8 07/01
%@ 0031-9007