Linear dispersion of dirac fermions in a single crystal of a solid solution (Cd1-x-yZnxMny)3As2 composition x = 0.29, y = 0.01

The value of the effective mass mc(0)/m0 is determined in single crystals of a solid solution (Cd0.7Zn0.29Mn0.01)3As2 according to the results of a study of Shubnikov-de Haase oscillations in a transverse magnetic field. We compared the Shubnikov and Hall parameters of charge carriers. We have found a weak dependence of the cyclotron mass on the magnetic field. We determined the concentration of charge carriers, n2d, the mobility of charge carriers, µ2d, and the thickness of the 2D surface layer. We have determined the value of the Dingle temperature TD = 34.6 K. We have established that the dependence of the cyclotron mass mc(0)/m0 on the Fermi wave vector kF, obtained from experimentally observed Shubnikov-de Haase oscillations, agrees well with the linear dependence predicted by the theory and indicates the presence of Dirac fermions with zero effective mass in single crystals (Cd0.7Zn0.29Mn0.01)3As2. The Hall resistance oscillations are presumably caused both by the nonequipotency of the probes and by the manifestation of the quantum Hall effect in the 2D layer.