New materials for holographic hydrodynamics

Dicembre 11, 2019@2:30 pm–3:30 pm
Aula 603

Seminario di Fisica Teorica Johanna Erdmenger (Wurzburg)

I will report on recent work of a team of researchers from both
AdS/CFT and condensed matter physics on proposing a new material with
an effective electron coupling three times larger than in graphene,
which is therefore expected to be even more suited for realizing
hydrodynamic electron flows than graphene. Also, the ratio of shear
viscosity over entropy density is expected to be smaller. The proposed
material is based on a Kagome lattice structure. Moreover, I will also
present new results on the Hall viscosity of electron flows in
channels. We find that at a critical magnetic field, the Hall viscosity
contribution cancels the ordinary Hall effect contribution to the total
Hall voltage. Finally, I will also mention recent results on how
quantum anomalies affect the Josephson current in inversion-asymmetric
Weyl semimetals.