کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1496154 | 992955 | 2010 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles study of the electronic structure and optical properties of the pure BaY2F8
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Ab-initio calculations based on density-functional theory have been employed to study the electronic structure and some optical properties of the pure BaY2F8 (BYF) crystal. The band gap is calculated to be 7.5Â eV. The electronic structure calculations revealed that the top of the valence band is dominated by the fluoride p-states, while the very bottom of the conduction band has predominantly yttrium d-character. The optical response in ultra-violet region is determined by calculating the complex dielectric tensor. It was found that the BYF crystal does not exhibit large optical anisotropy. Its principal absorption occurs due to electronic transitions from populated 2p states of the F to empty d-states of neighboring Y and Ba atoms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 32, Issue 12, October 2010, Pages 1633-1636
Journal: Optical Materials - Volume 32, Issue 12, October 2010, Pages 1633-1636
نویسندگان
J.M. Dantas, M.V. Lalic,