Fig. 3.

Low-energy electron dynamics. a–c Experimental band dispersions (colored dots), where the cut positions are indicated in the insets. The solid black curves are the calculated dispersions from DFT theory for the relevant bands. The dotted black curves are the DFT bands scaled by the corresponding mass enhancement values. d The measured mass enhancements of each band, which are all roughly 2–2.5. The error bars denotes the s.d. of the mass enhancement determined by using various ranges of the band dispersion