کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1516620 1511580 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
First-principles calculations of electronic, optical and elastic properties of ZnAl2S4 and ZnGa2O4
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
First-principles calculations of electronic, optical and elastic properties of ZnAl2S4 and ZnGa2O4
چکیده انگلیسی

The optimized crystal structures, band structures, partial and total densities of states (DOS), dielectric functions, refractive indexes and elastic constants for ZnAl2S4 and ZnGa2O4 were calculated using the CASTEP module of Materials Studio package. Pressure effects were modeled by performing these calculations for different values of external hydrostatic pressure up to 50 GPa. Obtained dependencies of the unit cell volume on pressure were fitted by the Murnaghan equation of state, and the relative changes of different chemical bond lengths were approximated by quadratic functions of pressure. Variations of applied pressure were shown to produce considerable re-distribution of the electron densities around ions in both crystals, which is evidenced in different trends for the effective Mulliken charges of the constituting ions and changes of contour plots of the charge densities. The longitudinal and transverse sound velocities and Debye temperatures for both compounds were also estimated using the calculated elastic constants.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Physics and Chemistry of Solids - Volume 71, Issue 10, October 2010, Pages 1435–1442
نویسندگان
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