Fig. 4: Calculated Berry curvature dipole and momentum-dependent Berry curvature.
From: Spin-orbit-splitting-driven nonlinear Hall effect in NbIrTe4
a The BCD (Da) contributing to the in-plane NLHE for bilayer NbIrTe4, plotted as a function of the chemical potential. b Momentum-resolved BC (Ωc(k) in Å2) of bilayer NbIrTe4 integrated from −12 to −7 meV corresponding to the red shaded area in panel (a). c Band structures in the area denoted as the black-dotted square in panel (b). d Band dispersion around the k-points contributing large Berry curvatures of bilayer NbIrTe4. The top panel shows bands near the Fermi energy expressed as solid magenta lines along the \(\bar{{{{{{\rm{X}}}}}}}\)-\(\bar{\Gamma }\)-\(\bar{{{{{{\rm{X}}}}}}}\) cut (dotted magenta box in panel (c). The black dashed lines are the bands calculated without spin–orbit coupling. The bottom panel is Ωc(k) integrated up to −10 meV relative to EF (red dashed line). e Chemical potential versus the component of the Da contributing to the in-plane NLHE for 12-layer NbIrTe4. f Integrated momentum-resolved BC (Ξk(E) for 12-layer NbIrTe4 (arb. units) integrated from −40 meV to EF, with the left, middle, and right panels corresponding to the energy range marked with red, magenta, and green arrows in panel (e), respectively. The black lines denote iso-energy surfaces at EF − 20 meV (left), EF − 10 meV (middle), and EF (right).
