Семінар відділу теорії нелінійних процесів в конденсованих середовищах
відбудеться 25 вересня 2017 р. об 1100 к. 322
(High Field Magnet Laboratory, Radboud University, Nijmegen, The Netherlands)
Magneto-optical infrared studies of the Weyl semimetals
We have investigated the far-infrared response of non-centrosymmetric Weyl semimetals (TaAs family) in zero magnetic field and in fields of up to 30 Tesla. Additionally, magnetotransport studies have been conducted on the same samples. We can reliably trace the transitions between different Landau levels. The transition frequencies demonstrate a square-root field dependence, typical for the linearly dispersed bands.
We compare the optical spectra of the compounds of TaAs family, describe the spectra by the recent models for the magneto-optical response of Weyl semimetals, and extract such parameters as the Fermi velocities of the carriers in the Weyl bands and the positions of the Fermi levels relative to the Weyl points.
In the presentation, I’ll also introduce you to the European high magnetic field experimental facilities available for the users. Show the experimental opportunities and discuss recent development in this area of experimental physics.