A nonlinear orbital magnetoelectric effect is derived for centrosymmetric materials via extended semiclassical theory, separating intrinsic and extrinsic parts with distinct relaxation-time scalings and reduced symmetry constraints in 2D.
Haldane model, where broken time-reversal ( T ) symmetry allows a finite intrinsic NOME
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Geometry-Driven Nonlinear Orbital Magnetoelectric Effect
A nonlinear orbital magnetoelectric effect is derived for centrosymmetric materials via extended semiclassical theory, separating intrinsic and extrinsic parts with distinct relaxation-time scalings and reduced symmetry constraints in 2D.