Fig. 3

Comparison of the QPI patterns with the DFT simulation. a, b The fast Fourier transform (FFT) images transformed from the dI/dV maps taken at +70 and −80 mV, respectively. The length of the scale bar is 0.3 Å⁻¹. The FFT images are symmetrized and drift-corrected. Only the patterns in the first Brillion Zone are shown. The overlaid yellow dashed ovals briefly outline the QPI patterns. c, d Schematic constant energy contours at E = +100 mV and E = −70 mV, respectively. e, f The DFT-simulated QPI patterns based on c and d