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We perform spin-polarized two-dimensional angular correlation of annihilationradiation (2D-ACAR) calculations for the recently predicted ZrCo$_2$Sn-WeylHeusler compound within the density functional theory using the generalizedgradient approximation (GGA) and its extension GGA+U. We confirm that withinthe GGA+U method, a pair of Weyl-points are revealed, and that by doping withNiobium, for the composition Nb$_{0.3}$Zr$_{0.7}$Co$_2$Sn, the Weyl points arereaching the Fermi level. Our 2D-ACAR results indicate the existence of theWeyl points, however, within the present calculation, it is uncertain if thesmearing at the Fermi level can be attributed to the positron wave function.

Positron annihilation spectroscopy for the pure and Niobium doped ZrCo$_2$Sn Heusler compound