Speaker
Florian Le Mardelé
Description
3D Dirac and Weyl semimetals are the analogs of graphene which possess 3D linear dispersion around points in the Brilloun zone. Optical and transport studies are widely used in order to explore these compound. TaIrTe$_4$ is expected to be a Weyl semimetals that have the fewest Weyl points - 4 - in comparison to TaAs, which contains 12 pairs. It has been theoretically shown that TaIrTe$_4$ hosts type II Weyl cones. This type should appear when electron and hole pockets touch in one conical point. Electronic transport in magnetic field allows to identify effective masses, number of carriers and position of Fermi level with respect to the Weyl points. These measurements are complemented by optical conductivity of TaIrTe$_4$.
Authors
Florian Le Mardelé
David Santos-Cottin
(Fribourg university)
Edoardo Martino
(EPFL)
Mario Novak
(University of Zagreb)
