کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1866681 | 1038037 | 2016 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
First-principles study of sulfur atom doping and adsorption on α-Fe2O3 (0001) film
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موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک و نجوم (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Using the spin-polarized density functional theory (DFT) and the DFT+U method, the geometric and electronic properties of the hematite α-Fe2O3 (0001) film with the sulfur (S) atom doping and adsorption have been investigated systematically. The most stable hematite α-Fe2O3 (0001) film with an anti-ferromagnetic arrangement is identified. For the study of sulfur adsorption on the film, the S adatom prefers to bond with three O atoms, in the center of a triangle formed by the three O atoms. The S acts as a cation at this site. The sulfur adsorption has introduced two gap states, in addition to the unoccupied surface states. Furthermore, with the most stable S-adsorption configuration, the diffusion of the S adatom from the surface to the inside is searched and the transition state along the minimum-energy pathway is also evaluated. For S-doping in the film, it is found that S substitution of O in the top layer is energetically favored than that in the deeper layer. It shows that the value of the band gap is reduced to â¼1.26 eV from â¼1.43 eV of the clean film. The formation energy of S substitution of O in the film is also obtained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Physics Letters A - Volume 380, Issue 38, 7 September 2016, Pages 3149-3154
Journal: Physics Letters A - Volume 380, Issue 38, 7 September 2016, Pages 3149-3154
نویسندگان
Jiao An, Prabath Wanaguru, Congxin Xia, Meng Tao, Qiming Zhang,