Vapor-Phase Synthesis and Magnetoresistance of (Cd 0.993 Zn 0.007 ) 3 As 2 Single Crystals

We report a highly anisotropic magnetoresistance of (Cd 0.993 Zn 0.007 ) 3 As 2 single crystals, which have been synthesized by the vapor-phase growth. Scanning electron microscopy and electron diffraction data confirm the high crystalline quality of obtained samples. Studied samples exhibit specific features such as octahedral nuclei growth and step-like morphology of the surface formed by {112} planes. The giant anisotropic magnetoresistance and Shubnikov-de Haas oscillations have been observed at low temperatures. The results suggest the existence of the Dirac semimetal phase in (Cd 1 − x Zn x ) 3 As 2 solid solution with low zinc content. Thus, the observed magnetoresistance anisotropy is partially attributed to the chiral anomaly.