Oxygen-centered hole polaron formation is energetically preferred over formal Fe4+ in Fe acceptor doped BaTiO3 under oxidizing conditions, limiting Fermi level shifts.
BaTiO 3, rhombohedral (BaTiO3 lt2, T = 40 K) crystal structure
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Why hole polaron formation on oxygen is limiting the Fermi level in Fe acceptor doped BaTiO$_{3}$ under oxidizing conditions
Oxygen-centered hole polaron formation is energetically preferred over formal Fe4+ in Fe acceptor doped BaTiO3 under oxidizing conditions, limiting Fermi level shifts.