BEGIN:VCALENDAR VERSION:2.0 PRODID:researchseminars.org CALSCALE:GREGORIAN X-WR-CALNAME:researchseminars.org BEGIN:VEVENT SUMMARY:Johanna Erdmenger (University of Würzburg) DTSTART:20200603T100000Z DTEND:20200603T110000Z DTSTAMP:20260423T040007Z UID:QM3/4 DESCRIPTION:Title: Turb ulent hydrodynamics in strongly correlated Kagome metals\nby Johanna E rdmenger (University of Würzburg) as part of Quantum Matter meets Maths ( IST\, Lisbon)\n\n\nAbstract\nA current challenge in condensed matter physi cs is the realization of strongly correlated\, viscous electron fluids. Th ese fluids are not amenable to the perturbative methods of Fermi liquid th eory\, but can be described by holography\, that is\, by mapping them onto a weakly curved gravitational theory via gauge/gravity duality. The canon ical system considered for realizations has been graphene\, which possesse s Dirac dispersions at low energies as well as significant Coulomb interac tions between the electrons. In this work\, we show that Kagome systems wi th electron fillings adjusted to the Dirac nodes of their band structure p rovide a much more compelling platform for realizations of viscous electro n fluids\, including non-linear effects such as turbulence. In particular\ , we find that in stoichiometric Scandium (Sc) Herbertsmithite\, the fine- structure constant\, which measures the effective Coulomb interaction and hence reflects the strength of the correlations\, is enhanced by a factor of about 3.2 as compared to graphene\, due to orbital hybridization. We em ploy holography to estimate the ratio of the shear viscosity over the entr opy density in Sc-Herbertsmithite\, and find it about three times smaller than in graphene. These findings put\, for the first time\, the turbulent flow regime described by holography within the reach of experiments.\n LOCATION:https://researchseminars.org/talk/QM3/4/ END:VEVENT END:VCALENDAR