INSP - UPMC - 4 place Jussieu - 75005 Paris - Barre 22-32, 2e étage, salle 201
Milan Orlita, Laboratoire National des Champs Magnétiques Intenses, CNRS-Université Grenoble-Alpes
The class of solid-state systems hosting massless electrons has been recently expanded to include materials with truly 3D conical bands. In my talk, I will review our recent high-field infrared magneto-spectroscopy studies of two such materials : HgCdTe [1,2], tuned to the point of the topological semimetal-semiconductor transition and hosting 3D massless Kane electrons, and Cd3As2 , recently reported to be the premier 3D topological Dirac semimetal, which is stable at ambient conditions.
 M. Orlita et al., Nature Phys. 10, 233 (2014)
 F. Teppe et al., Nature Comm. 7, 12576 (2016)
 A. Akrap et al., Phys. Rev. Lett. 117, 136401 (2016)