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Multiple optical impacts of anion doping in epitaxial barium titanate films

التفاصيل البيبلوغرافية
العنوان: Multiple optical impacts of anion doping in epitaxial barium titanate films
المؤلفون: M. Tyunina, O. Vetokhina, N. Nepomniashchaia, O. Pacherova, S. Cichon, T. Kocourek, M. Jelinek, A. Dejneka
المصدر: APL Materials, Vol 8, Iss 7, Pp 071107-071107-6 (2020)
بيانات النشر: AIP Publishing LLC, 2020.
سنة النشر: 2020
المجموعة: LCC:Biotechnology
LCC:Physics
مصطلحات موضوعية: Biotechnology, TP248.13-248.65, Physics, QC1-999
الوصف: Multiple strong impacts of anion doping Λ (Λ = oxygen vacancy, nitrogen, or hydrogen) on the optical properties in the near-infrared to vacuum ultraviolet spectral range are experimentally revealed in cube-on-cube-type epitaxial perovskite BaTiO3−δΛδ films (δ ≤ 0.01) grown on (001)SrTiO3 substrates. Compared to the reference undoped films and bulk crystal, the anion-doped films exhibit massive changes of the index of refraction in the transparency range Δn of ∼0.1 to 0.2, a profound bandgap widening ΔEg of ∼0.3 eV to 0.4 eV, a dopant-specific near-edge absorption, and doping-induced interband transitions. Both the conduction-band uplift and the changes in the index of refraction are ascribed to the internal stress and electric field, which result from epitaxially controlled dopant locations in the [Ba–O](001) planes. The dopant-induced in-gap states are responsible for the near-edge absorption, whereas the dopant-induced conduction-band states are suggested to modify the interband transitions and the intrinsic elasto- and electro-optic coefficients.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2166-532X
Relation: https://doaj.org/toc/2166-532X
DOI: 10.1063/5.0007209
URL الوصول: https://doaj.org/article/859a60c246b344a3a1b3f4299a477bf9
رقم الأكسشن: edsdoj.859a60c246b344a3a1b3f4299a477bf9
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:2166532X
DOI:10.1063/5.0007209