Abstract
Wannier functions are a powerful tool for the determination of topological properties of solids based on band structure calculations. Here, the authors present a simple and efficient scheme to obtain symmetry-conserving Wannier functions especially suitable for local orbital codes. They analyze which approximation of the basis contribution to the Berry connection and curvature matrices preserves symmetry and argue which Bloch function gauge is best suited for model systems, where the basis is not explicitly known.
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