Theoretical study reveals distinct polaron characteristics in ferroelectric lead titanate, suggesting unique behaviors for holes and electrons.
Holes in PbTiO 3 form 2D large polarons on oxygen sites (weak coupling), while electrons form small polarons at Titanium sites (strong coupling). Spin–orbit coupling barely affects hole polarons but significantly delocalizes electron polarons.
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Hao et al. (2026) studied this question.
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