Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal
In this study, the electron structure of the α-Al2O3 rhombohedral graft has been investigated. The alpha-alumina structure belongs to the space group R3c and the rhombohedral with two units of formula (10 atoms) in the primary unit cell. Although the most widely used structure is hexagonal, it consi...
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Nuclear Science and Technology Research Institute
2020-02-01
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| Series: | مجله علوم و فنون هستهای |
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| Online Access: | https://jonsat.nstri.ir/article_1071_c3a70150a8d0baf9d5271a8fdebece5a.pdf |
| _version_ | 1797835207540211712 |
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| author | A Alipour A.A Sabouri Dodaran A Shahvar |
| author_facet | A Alipour A.A Sabouri Dodaran A Shahvar |
| author_sort | A Alipour |
| collection | DOAJ |
| description | In this study, the electron structure of the α-Al2O3 rhombohedral graft has been investigated. The alpha-alumina structure belongs to the space group R3c and the rhombohedral with two units of formula (10 atoms) in the primary unit cell. Although the most widely used structure is hexagonal, it consists of 12 aluminum atoms and 18 atomic oxygen units, six units of formulas. The role of defects in the crystalline network, especially the vacancy defect, is investigated in this work. The band structure changes are evaluated in the absence of one of the O or Al atoms. The calculations showed that α-Al2O3 has a direct transition at Γ, and the energy gap obtained from the density functional theory (DFT) method is 6.3 eV. Also, the depletion effect of O is higher than that of Al on the crystal electron structure: α-Al2O3:C, and is useful in increasing the response of this crystal as a detector. |
| first_indexed | 2024-04-09T14:49:28Z |
| format | Article |
| id | doaj.art-fb6d576640114c9e91078dd1f4614ea1 |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:49:28Z |
| publishDate | 2020-02-01 |
| publisher | Nuclear Science and Technology Research Institute |
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| series | مجله علوم و فنون هستهای |
| spelling | doaj.art-fb6d576640114c9e91078dd1f4614ea12023-05-02T10:15:41ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هستهای1735-18712676-58612020-02-01404576110.24200/nst.2020.10711071Investigation of vacancies effects on the electronic structure of α-Al2O3 crystalA Alipour0A.A Sabouri Dodaran1A Shahvar2Department of Radiation Detection & Dosimetry, Radiation Application Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 31465-1498, Karaj-IranDepartment of Physics, Faculty of Science, Payame Noor University, P.O.Box: 19395-3697, Tehran -IranDepartment of Radiation Detection & Dosimetry, Radiation Application Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 31465-1498, Karaj-IranIn this study, the electron structure of the α-Al2O3 rhombohedral graft has been investigated. The alpha-alumina structure belongs to the space group R3c and the rhombohedral with two units of formula (10 atoms) in the primary unit cell. Although the most widely used structure is hexagonal, it consists of 12 aluminum atoms and 18 atomic oxygen units, six units of formulas. The role of defects in the crystalline network, especially the vacancy defect, is investigated in this work. The band structure changes are evaluated in the absence of one of the O or Al atoms. The calculations showed that α-Al2O3 has a direct transition at Γ, and the energy gap obtained from the density functional theory (DFT) method is 6.3 eV. Also, the depletion effect of O is higher than that of Al on the crystal electron structure: α-Al2O3:C, and is useful in increasing the response of this crystal as a detector.https://jonsat.nstri.ir/article_1071_c3a70150a8d0baf9d5271a8fdebece5a.pdfvacancyα-al2o3density functional theory (dft) |
| spellingShingle | A Alipour A.A Sabouri Dodaran A Shahvar Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal مجله علوم و فنون هستهای vacancy α-al2o3 density functional theory (dft) |
| title | Investigation of vacancies effects on the electronic structure
of α-Al2O3 crystal |
| title_full | Investigation of vacancies effects on the electronic structure
of α-Al2O3 crystal |
| title_fullStr | Investigation of vacancies effects on the electronic structure
of α-Al2O3 crystal |
| title_full_unstemmed | Investigation of vacancies effects on the electronic structure
of α-Al2O3 crystal |
| title_short | Investigation of vacancies effects on the electronic structure
of α-Al2O3 crystal |
| title_sort | investigation of vacancies effects on the electronic structure of α al2o3 crystal |
| topic | vacancy α-al2o3 density functional theory (dft) |
| url | https://jonsat.nstri.ir/article_1071_c3a70150a8d0baf9d5271a8fdebece5a.pdf |
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