Over 100 invited talks. Here are a few online ones.  

Giant Nonlinear Optical Responses in Polar Weyl Semimetals
​Colloquium at Department of Material Science & Engineering at Drexel University

Antiferromagnetic resonance and THz continuum in α-RuCl3 (Slides)
Invited talk at HFM 2018
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Low-energy electrodynamics of topological insulator thin films (Slides)
Condensed Matter Seminar at Perimeter Institute for theoretical Physics