Fig. 4
From: Chiral Landau levels in Weyl semimetal NbAs with multiple topological carriers
Landau fan diagram of massive fermions with different topological nature. a Inter-Landau-level resonance energy versus magnetic field. For those transition already plotted in Fig.2a, error bars are not shown. Dashed straight lines with labels represent massive fermions with band gap. Color in dark green denotes the transition from the inverted gap structure. Color in gray describes the transitions from quadratic normal bands or undefined bands. The inset is the mid-infrared magneto-optic spectrum at 17.5 T. b, c The Landau fan diagrams of the inverted and normal gap case according to Eq. (7), respectively. d, e The frequency versus \(\sqrt B\) relation of the lowest two optical transitions in b and c, respectively. The parameters in Eq. (7) chosen for illustration are: for b and d Cm/v2 = 0.5, Δ/m = 0.5; for c, e Cm/v2 = -0.5, Δ/m = 0.5; \(k_0 = \sqrt {m/2C}\). Note that the qualitative difference between the inverted case and normal case does not depend on the parameters chosen
