[phys4phys] SCL online seminar: Rene Meyer, Thursday, 2 June, 14:00

[Antun Balaz]

Dear colleagues,

You are cordially invited to the SCL online seminar of the Center for the Study of Complex Systems, which will be held on Thursday, 2 June 2022 at 14:00 on Zoom (link is given below). The talk entitled

Strongly correlated Dirac materials, electron hydrodynamics, and AdS/CFT

will be given by Dr. Rene Meyer (University of Würzburg, Germany). Abstract of the talk:

A current challenge in condensed matter physics 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 onto a weakly curved gravitational theory via gauge/gravity duality. The canonical system considered for realizations has been graphene, which possesses Dirac dispersions at low energies as well as significant Coulomb interactions between the electrons. In this talk, after introducing basic notions of hydrodynamics and holography, we will discuss Kagome systems which, with electron fillings adjusted to the Dirac nodes of their band structure, provide a much more compelling platform for realizations of viscous electron fluids, including non-linear effects such as turbulence. In particular, 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. We will present a holographic model which includes the leading finite coupling corrections and allows to estimate the ratio of shear viscosity over entropy 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.

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Time: Jun 2, 2022 14:00 Belgrade
https://us02web.zoom.us/j/88146463326?pwd=eFJmVTdQUjdRM3hsNGhzMjhQZUVuQT09

Meeting ID: 881 4646 3326
Passcode: 928695
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Best regards,
Antun Balaž

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Dr. Antun Balaž
Research Professor

http://www.scl.rs/antun
Phone: +381 11 3713152
Fax: +381 11 3162190

Scientific Computing Laboratory
Center for the Study of Complex Systems

Institute of Physics Belgrade
National Institute of the Republic of Serbia
Pregrevica 118, 11080 Belgrade, Serbia
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