Two 2D polymorphs of antimony dioxide, γ-Sb 2 O 4 and δ-Sb 2 O 4 , are predicted using the evolutionary algorithm and first-principles calculations. Out-of-plane ferroelectricity is found in γ-Sb 2 O 4 , while in-plane ferroelectricity is found in δ-Sb 2 O 4.
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Bhattarai et al. (2022) studied this question.
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