BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Rene Meyer (University of Wurzburg) DTSTART:20200602T140000Z DTEND:20200602T150000Z DTSTAMP:20260423T022918Z UID:HoloTube/7 DESCRIPTION:Title: Strongly correlated Dirac materials\, electron hydrodynamics & AdS/CFT\nby Rene Meyer (University of Wurzburg) as part of HoloTube: Applied hol ography webinars\n\n\nAbstract\nA current challenge in condensed matter ph ysics is the realization of strongly correlated\, viscous electron fluids. These fluids are not amenable to the perturbative methods of Fermi liquid theory\, but can be described by holography\, that is\, by mapping them o nto a weakly curved gravitational theory via gauge/gravity duality. The ca nonical system considered for realizations has been graphene\, which posse sses Dirac dispersions at low energies as well as significant Coulomb inte ractions between the electrons. In this talk\, after introducing basic not ions of hydrodynamics and holography\, I will discuss Kagome systems which \, with electron fillings adjusted to the Dirac nodes of their band struct ure\, provide a much more compelling platform for realizations of viscous electron fluids\, including non-linear effects such as turbulence. In par ticular\, in stoichiometric Scandium (Sc) Herbertsmithite\, the fine-struc ture constant\, which measures the effective Coulomb interaction and hence reflects the strength of the correlations\, is enhanced by a factor of ab out 3.2 as compared to graphene. I will present a holographic model which includes the leading finite coupling corrections and allows to estimate th e ratio of shear viscosity over entropy density in Sc-Herbertsmithite\, an d find it about three times smaller than in graphene. These findings put\, for the first time\, the turbulent flow regime described by holography wi thin the reach of experiments.\n LOCATION:https://researchseminars.org/talk/HoloTube/7/ END:VEVENT END:VCALENDAR