Graphene: A Nearly Perfect Fluid

TitleGraphene: A Nearly Perfect Fluid
Publication TypeJournal Article
Year of Publication2009
AuthorsMuller M, Schmalian J, Fritz L
Journal TitlePhysical Review Letters
Volume103
Pages025301
Date Published07/01
ISBN Number0031-9007
Accession NumberISI:000267887800032
Keywordscritical-points, fermi-liquid behavior, gas, systems
Abstract

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.

URL<Go to ISI>://000267887800032
DOI10.1103/Physrevlett.103.025301