کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562407 999586 2011 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Efficient supercell design for surface and interface calculations of hexagonal phases: α-Al2O3 case study
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Efficient supercell design for surface and interface calculations of hexagonal phases: α-Al2O3 case study
چکیده انگلیسی

Challenges in modelling of surface and interfaces of non-cubic materials are addressed in this work. For hexagonal and rhombohedral crystals, the orthorhombic description introduced here enables efficient supercell design for modelling (0 0 0 1), (1 1 −2 0) and (1 −1 0 0) surfaces and interfaces. In this work, surface relaxations and energies of α-Al2O3 (0 0 0 1), (1 1 −2 0) and (1 −1 0 0) have been studied by ab initio calculations using the orthorhombic description. Excellent agreement with previously reported theoretical and experimental data confirms the reliability. Since this orthorhombic description involves purely geometrical transformation, this approach may enable a more efficient treatment of other phases of hexagonal symmetry.

Research highlights
► For hexagonal crystals, surface modelling of non basal planes is challenging.
► The orthorhombic description of the hexagonal symmetry was introduced.
► Surface relaxations and energies of α-Al2O3 were obtained by ab initio calculations.
► Excellent agreement with previously reported data was achieved.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 50, Issue 3, January 2011, Pages 1197–1201
نویسندگان
, , ,