کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8001120 | 1516278 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Optoelectronic behavior of Quaternary Uranium Chalcogenides Rb2Pd3UM6 (MÂ =Â S, Se): A first principle study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Optoelectronic behavior of Quaternary Uranium Chalcogenides Rb2Pd3UM6 (MÂ =Â S, Se): A first principle study Optoelectronic behavior of Quaternary Uranium Chalcogenides Rb2Pd3UM6 (MÂ =Â S, Se): A first principle study](/preview/png/8001120.png)
چکیده انگلیسی
First principle calculations of electronic, Fermi surface, electronic charge density and optical properties of Quaternary Uranium Chalcogenides Rb2Pd3UM6 (MÂ =Â S, Se) are performed using full potential linear augmented plane wave (FP-LAPW) method within the frame work of density functional theory. Using mBJ method, the electronic band curves overlap at Fermi level and show metallic band structure for both compounds. The calculated densities of states (DOS) spectra show that the valence band is mainly attributed to Rb-p, Pd-d and S-s/p or Se-s/p states; conduction band is mainly attributed to Pd-d, U-f and S-p or Se-p/d states. From the electronic charge density spectrum, it is revealed that a strong covalent bond exists between Pd and S, and Pd or Se while charge transfer between U and S, U and Se, Rb and S, and Rb and Se atoms results in ionic bond nature. It is noted from Fermi surface calculations that both compounds comprise same number of fast velocity electrons but differs in slow or intermediate velocity of electrons. The calculated frequency dependent dielectric function, energy loss function and reflectivity show a considerable anisotropy for both compounds.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 615, 5 December 2014, Pages 507-513
Journal: Journal of Alloys and Compounds - Volume 615, 5 December 2014, Pages 507-513
نویسندگان
Haleem Ud Din, Sikander Azam, Saleem Ayaz Khan, R. Khenata,