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the claim
PBE and LDA density functional approximations can sometimes outperform more expensive methods.
the verdict
SUPPORTED
the evidence backs this
refutedsupported
the weight of evidence
2 sources for · 0 against

PBE and LDA density functional approximations can sometimes outperform or match more expensive methods while requiring significantly less computational effort.

Evidence for · 2
<i>Ab initio</i> quasi-particle approximation bandgaps of silicon nanowires calculated at density functional theory/local density approximation computational effort
2015 · cited by 8
Paper [2] demonstrates that the LDA-1/2 computational approach predicts bandgaps of silicon nanowires with excellent accuracy comparable to much more expensive GW methods, but at LDA computational cost.
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The analysis

The retrieved papers include studies showing that lower-cost density functional approximations (like LDA variants and PBE-based schemes) can achieve high accuracy compared to expensive methods such as GW or hybrid functionals, particularly when appropriate corrections or specific properties are evaluated.

More for · 1
An Accurate Alternative to Hybrid Functionals for Germanium: DFT+α.
2026 · cited by 0
Paper [8] introduces a semiempirical correction (DFT+alpha) that reproduces germanium properties accurately at a fraction of the computational cost of hybrid functionals.
The paper trail · every fact has a biography
first checked04 Aug 2026
judged → SUPPORTED · 8104 Aug 2026
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