Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal

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ALIPOUR A.; Sabouri Dodaran A.A.; SHAHVAR A.

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Journal: JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY Year:2020 | Volume:40 | Issue:90 (4) Page(s): 57-61

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Title

Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal

Author(s)

ALIPOUR A. | Sabouri Dodaran A.A. | SHAHVAR A. | Issue Writer Certificate

Keywords

VacancyQ2

α-Al2O3Q1

Density functional theory (DFT)Q1

Abstract

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.

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APA: Copy

ALIPOUR, A., Sabouri Dodaran, A.A., & SHAHVAR, A.. (2020). Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal. JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, 40(4 (90) ), 57-61. SID. https://sid.ir/paper/97596/en

Vancouver: Copy

ALIPOUR A., Sabouri Dodaran A.A., SHAHVAR A.. Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal. JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY[Internet]. 2020;40(4 (90) ):57-61. Available from: https://sid.ir/paper/97596/en

IEEE: Copy

A. ALIPOUR, A.A. Sabouri Dodaran, and A. SHAHVAR, “Investigation of vacancies effects on the electronic structure of α-Al2O3 crystal,” JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY, vol. 40, no. 4 (90) , pp. 57–61, 2020, [Online]. Available: https://sid.ir/paper/97596/en

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