5 papers
Why hole polaron formation on oxygen is limiting the Fermi level in Fe acceptor doped BaTiO under oxidizing conditions
Mohammad Amirabbasi, Emre Erdem, Denis Sudarikov +3
Oxidizing Fe-doped BaTiO is commonly expected to convert substitutional Fe acceptors into formal Fe centers. Yet, the experimentally accessible picture based on e…
Accurate Nanoscale Mapping of Electric Fields across Random Grain Boundaries in Polycrystalline Oxides Using Precession-Assisted 4D-STEM
Sangjun Kang, Hyeyoung Cho, Maximilian Töllner +12
Space charge layers (SCLs) at grain boundaries play a crucial role in modulating local electric fields and influencing the functional properties of materials, such as oxygen vacanc…
Impact of charge transition levels on grain boundary properties in acceptor doped oxide ceramics: A phase-field study
Kai Wang, Sangjun Kang, Mahmoud Serour +8
Advanced doping strategies enable oxide ceramic functionalities by tailoring bulk defect chemistry and space-charge-layer (SCL) behavior at interfaces. Charge transition levels (CT…
Towards understanding the defect properties in the multivalent A-site NaBiTiO-based perovskite ceramics
Pengcheng Hu, Chinmay Chandan Parhi, Jurij Koruza +1
A defect model involving cation and anion vacancies and anti-site defects is proposed that accounts for the non-stoichiometry of multi-valent -site NaBiTiO b…
How semiconducting are ferroelectrics: The fundamental, optical and transport gaps of NaBiTiO-BaTiO and NaNbO
Pengcheng Hu, Nicole Bein, Chinmay Chandan Parhi +7
The energy gap is a fundamental property of materials, directly related to their optical and electronic properties. The energy gap of ferroelectric compounds and its adjustment by…