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.
The calculation of integral weights is susceptible to precision loss close to any of these limiting cases
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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.