Shubnikov-de Haas Oscillations in 3D Dirac semimetal Cd3As2

Cadmium arsenide (Cd3As2) was known for its inverted band structure and ultra-high electron mobility. It has been theoretically predicted to exhibit a 3D Dirac semimetal phase containing degenerate Weyl nodes, which was recently confirmed by ARPES experiments. By conducting magneto-transport measurements in high quality single crystals of Cd3As2, we found a single frequency F $=$ 67 Tesla in the Shubnikov-de Haas (SdH) oscillations giving an effective mass m* $=$ 0.057 me with electron mobility as high as 99,500 cm$^{2}$/V-sec, which is consistent with the calculated 3D Dirac semimetal band. In a certain field orientation, we found a splitting of the SdH oscillation frequency in the FFT spectrum, which infers a possible lifting of the degeneracies. Detailed magnetotransport data in several doped and undoped single crystals of Cd3As2 will be presented and discussed.