Extended Data Fig. 5: FFT analysis using different window functions.
From: High-mobility holes in gallium nitride and their quantum oscillations
a-d, Prior to performing FFT, both LH and HH oscillation signals (see Fig. 2) are multiplied by Tukey windows (black solid lines) of different r-values—r = 1.0 (a), which is the Hanning window; r = 0.8; r = 0.6 (b); r = 0.4 (c); r = 0.2 (d)—to obtain the mean and standard deviation in extracted FFT peak frequencies and amplitudes.
