A recursive tetrahedron refinement scheme computes Brillouin-zone integrals as weighted sums on the original grid, improving convergence for response functions with step, delta, and pole singularities.
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A Recursive Hybrid Tetrahedron Method for Brillouin-zone Integration
A recursive tetrahedron refinement scheme computes Brillouin-zone integrals as weighted sums on the original grid, improving convergence for response functions with step, delta, and pole singularities.