Fig. 3
From: Topological Lifshitz transitions and Fermi arc manipulation in Weyl semimetal NbAs
Measured and calculated band structures of pristine and K–decorated NbAs. a Core-level photoemission spectrum of cleaved NbAs (001) surface (pristine), clearly showing the characteristic As and Nb peaks. b 3D intensity plot of the band structure illustrating the band dispersions. c Excellent agreement between measured and calculated band dispersions along high-symmetry directions with trivial surface states (Trivial SSs) and topological surface states (TSSs generating SFAs) marked. d Side-by-side comparison between experiments and calculations, which exhibits good agreement, of three representative constant-energy contours (Eb = 0, 0.15, 0.30 eV). For comparison, these contours are obtained by mirroring the photoemission spectrum with respect to the ky axis. e Core-level photoemission spectrum of K-dosed NbAs, which clearly displays the K 3p peak, and pristine NbAs. f–h: same as b–d but displaying the band structures of K-decorated NbAs. Our measured data agree well with the calculations. In g, Cyan arrows mark band crossings of the TSSs (corresponding to SFAs). (Note that the color scale of the calculated bands represent their surface projection, i.e., the bold red curves represent the surface states while the faded red curves represent bands with strong bulk origin)
