Transport evidence of mass-less Dirac fermions in (Cd1−x−yZnxMny)3As2 (x + y = 0.4)

Charge carriers parameters on a 2D-layer surface for (Cd 1−x−y Zn x Mn y ) 3 As 2 ( y  = 0.08) (the concentration n 2 D  = 1.9 × 10 12 cm –2 , the effective value of the 2D-layer d 2 D = n 2 D / n 3 D  = 14.5 nm, the wave vector k F  = 0.1 nm –1 , the charge carriers relaxation time due to dispersion τ D  = 1.8 × 10 –13 s, the velocity of charge carriers on Fermi surface v F = ℏ k F / m c  = 2.6 5  × 10 5 m s −1 , the mean free path l F = v F τ D  = 47.7 nm) were determined. It was found that the dependence of the cyclotron m ass m с (0)/m 0 on Fermi wave vector k F for (Cd 1−x−y Zn x Mn y ) 3 As 2 ( y  = 0.08) is in compliance with a theoretical linear dependence, that describes mass-less Dirac fermions.