(color online) Pulsed high field experiments. (a) Magnetoresistance and Hall resistance as functions of the perpendicular field along the a axis. The data is presented at 4.2 K. (b) Nearly quantized plateau in divided by the number Z as a function of 1/B. Adjacent LLs are separated by . Inset: normalized of each Landau level aligns in a straight line. Red dashed line is the linear fitting, yielding a slope of with 3% deviation from the standard value . (c) Oscillatory beating patterns were developed in sample 1 and sample 2. The first node position is around 10 T. (d) Peak splitting in the FFT transform spectrum of high field SdH oscillations of sample 1. The two frequencies are 74.6 T and 88.2 T respectively, indicating two Fermi surfaces differing 18% in cross-section areas. (e) Conductivity oscillation in 1/B scale at 4.2 K with . Pulsed field of 60 T drove sample to the second Landau level. Pronounced Zeeman splitting was observed as labeled on the plot. An oscillatory beating pattern can be observed. The red dashed line is for guiding eyes. (f) Angular dependence of the Zeeman splitting spacing. Red and navy arrows show the splitting spacing change of the and Landau levels.