A translationally equivariant and higher-order finite-difference method for Wannier interpolation yields more accurate Wannier centers, position matrices, electric polarization, orbital magnetization, and spin Hall conductivity.
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In a V-shaped 1D chain the nonmagnetic magnetoelectric response peaks near apex angle 0.6π because geometry induces an effective spin-orbit term whose angular factor sinθ sin(θ/2) matches Kubo-formula numerics.
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Accurate calculation of Wannier centers, position matrix, and composite operators using translationally equivariant and higher-order finite differences
A translationally equivariant and higher-order finite-difference method for Wannier interpolation yields more accurate Wannier centers, position matrices, electric polarization, orbital magnetization, and spin Hall conductivity.
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Shape dependence of Edelstein and magnetoelectric effects in the V-shaped model
In a V-shaped 1D chain the nonmagnetic magnetoelectric response peaks near apex angle 0.6π because geometry induces an effective spin-orbit term whose angular factor sinθ sin(θ/2) matches Kubo-formula numerics.