BaMnBi2 hosts a spin-valley locked electronic state with fourfold degeneracy, evidenced by stacked QHE and NLHE showing valley-contrasted Berry curvature, distinct from the twofold degeneracy in BaMnSb2.
Ma et al., Observation of the nonlinear Hall effect under time-reversal-symmetric conditions, Nature 565, 337 (2019)
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Evidence of Spin-Valley Coupling in Dirac Material BaMnBi2 Probed by Quantum Hall Effect and Nonlinear Hall Effect
BaMnBi2 hosts a spin-valley locked electronic state with fourfold degeneracy, evidenced by stacked QHE and NLHE showing valley-contrasted Berry curvature, distinct from the twofold degeneracy in BaMnSb2.