Fig. 5: Bulk spin texture of multifold fermion at R.
From: Weyl spin-momentum locking in a chiral topological semimetal
a Band dispersion along the R-\(\overline{{{{{{{{\rm{Y}}}}}}}}}\) high symmetry direction, measured with hν = 74 eV. b Calculated spin texture (yellow arrows) at Eb = − 0.75 eV; corresponding to the band E(d) indicated in a. c Spin polarization as a function of binding energy at different momenta around R indicated by red dots and labelled by the Roman numerals in b. Different colors indicate different light polarizations. The position in k-space and the binding energy corresponding to cut ii are indicated in a by a dashed line and a black box, respectively. The spin polarization was assumed to be zero within the bulk band gap indicated by the black shaded region Eref in a. The error bars show the statistical error due to counting statistics. d In-plane (ϕin-plane) and out-of-plane (θout-of-plane) direction and magnitude of the spin polarization within the energy window E(d), shaded black and indicted by black lines in a and c, respectively. The dashed black line in b and d indicate the direction expected for Weyl-type SML around the R point. The error bars show a combination of statistical and systematical errors. The systematical error was estimated by varying the position of Eref within the gray shaded region in a. The precise calculation is provided in Supplementary Note 3.
