Magneto-transport measurement in BiTeI single crystal*

Noncentrosymmetric BiTeI has attracted many attentions in recent years. It exhibits unusual giant bulk Rashba-type spin splitting that may have great potential in spin electronics application. Here, we show the magneto-transport measurement results in high quality BiTeI single crystals with magnetic field up to 15 Tesla. Two distinct frequencies in Shubnikov-de Hass (SdH) oscillation were observed giving extremal Fermi surface areas of A$_{e1} =$ 9.1x10$^{12}$ cm$^{-2}$ and A$_{e2} =$ 3.47x10$^{14}$ cm$^{-2}$. From temperature dependence of the SdH oscillation amplitude, we determined the corresponding cyclotron masses to be m$_{1\, }=$ 0.036 m$_{e}$ and m$_{2}=$ 0.17 m$_{e}$. Those results are in good agreement with relativistic band structure calculations showing large bulk Rashba-type spin splitting effect.