Fig. 5: Predicted Weyl points in the orthorhombic Pbnm (D2h) phase of SrRuO3.
From: Quantum transport evidence of Weyl fermions in an epitaxial ferromagnetic oxide
a Band structure for the ferromagnetic ground state without spin-orbit coupling as obtained from GGA + U calculations with U = 2.6 eV and J = 0.6 eV. b Band structure for the ferromagnetic state with spin–orbit coupling and the magnetization along the orthorhombic c-axis obtained from GGA + U + SOC calculations with U = 2.6 eV and J = 0.6 eV. Two pairs of bands I (orange and dark orange bands) and II (green and dark green bands) are selected for calculating the corresponding chirality \(\chi\) at each band crossing point. c Positions of the Weyl points in the irreducible part of the Brillouin zone calculated for two pairs of bands I (orange filled and open circles for \(\chi\) = 1 and −1, respectively) and II (green filled and open circles for \(\chi\) = 1 and −1, respectively). Numbers next to the points indicate their energy distance from the Fermi level (E − EF, where EF is the Fermi energy) in eV unit. Vertical orange and green lines indicate the in-plane (Γ–X–S–Y plane) positions of the Weyl points for easy viewing. Note that the orange and dark green bands are degenerate at the border of the Brillouin zone (X–S–Y and Z–U–R–T–Z).
