Extended Data Fig. 4: Identification of additional peaks in the Fourier transform linecut along the charge stripe direction.

Fourier transform linecut of L(r, V) maps along the q_4a0-CO (charge stripe) direction at 4.5 K (same as Fig. 3g). The green dashed lines are visual guides showing the most prominent additional non-dispersive peaks. Green arrows denote all the satellite peaks we observe, approximately equally spaced from the dominant peaks. The black, blue and brown arrows indicate the dominant peaks: the low-frequency peak (q_low) likely associated with the satellite peaks, unidirectional charge order peak (q_4a0-CO) and tri-directional charge order peak (q_2a0-CO), respectively. STM setup condition: V_sample = 100 mV, I_set = 600pA, V_exc = 4 mV, T = 4.5 K.