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人工晶体学报 ›› 2021, Vol. 50 ›› Issue (1): 38-42.

• 研究论文 • 上一篇    下一篇

Mn掺杂LiNbO3结构ZnTiO3的磁性和光电性质的第一性原理研究

苏锟仁, 梁一机, 林尔庆, 王国, 徐祥福, 陈星源, 赖国霞   

  1. 广东石油化工学院理学院,物理实验教学中心,茂名 525000
  • 收稿日期:2020-05-25 出版日期:2021-01-15 发布日期:2021-03-01
  • 通讯作者: 赖国霞,实验师。E-mail:85laiguoxia@163.com
  • 作者简介:苏锟仁(1999—),男,广东省人。E-mail:sukunren@163.com
  • 基金资助:
    国家自然科学基金(11547201);广东省自然科学基金(2019A1515011914)

First-Principles Study on the Magnetic and Photoelectric Properties of Mn-Doped ZnTiO3 with LiNbO3 Strcture

SU Kunren, LIANG Yiji, LIN Erqing, WANG Guo, XU Xiangfu, CHEN Xingyuan, LAI Guoxia   

  1. Physics Experiment Teaching Center, College of Science, Guangdong University of Petrochemical Technology, Maoming 525000, China
  • Received:2020-05-25 Online:2021-01-15 Published:2021-03-01

摘要: 采用密度泛函理论计算了Mn掺杂LiNbO3结构的ZnTiO3(LN-ZnTiO3)的磁性和光电性质。计算结果表明Mn掺杂LN-ZnTiO3倾向占据Zn位,形成稳定的3d5电子构型。Mn替代Zn位掺杂可以为LN-ZnTiO3提供较大的局域磁矩,约为5 μB。同时在价带顶附近形成明显的Mn-3d和O-2p轨道的受主能级,降低了材料的带隙,促进可见光的吸收。在LN-ZnTiO3中掺杂Mn可以同时实现较大的局域磁矩和p型半导体的特性,拓展了材料在磁学和可见光吸收领域的应用。

关键词: LN-ZnTiO3, Mn掺杂, 磁性, 光电性质, 第一性原理

Abstract: The magnetic and photoelectric properties of Mn-doped LN-ZnTiO3 were calculated through density functional theory. The calculated results show that Mn-doped LN-ZnTiO3 tends to occupy the Zn site, which forms a stable 3d5 electronic configuration. Mn instead of Zn doping in LN-ZnTiO3 can provide with a large local magnetic moment of about 5 μB. At the same time, an obvious acceptor energy level of Mn-3d and O-2p orbitals are formed near the top of the valence band, which reduces the band gap and promotes the absorption of visible light. Mn doping in LN-ZnTiO3 could achieve a large local magnetic moment and the characteristics of p-type semiconductor, which expands the application of materials in magnetics and visible light absorption.

Key words: LN-ZnTiO3, Mn doping, magnetic property, photoelectric property, first-principle

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