计算物理 ›› 2008, Vol. 25 ›› Issue (2): 213-217.

• 研究论文 • 上一篇    下一篇

钼酸铅晶体中F型色心电子结构的理论计算

陈建玉, 张启仁, 刘廷禹, 邵泽旭, 濮春英   

  1. 上海理工大学 理学院, 上海 200093
  • 收稿日期:2006-11-30 修回日期:2007-05-27 出版日期:2008-03-25 发布日期:2008-03-25
  • 作者简介:陈建玉(1978-),男,硕士,山东临沂,从事计算凝聚态物理方面的研究,上海理工大学92信箱200093.
  • 基金资助:
    上海市重点学科建设(T0501);上海市教育委员会发展基金(批准号:04EB09)资助项目

Electronic Structures of PbMoO4 Crystal with F-type Color Centers

CHEN Jianyu, ZHANG Qiren, LIU Tingyu, SHAO Zexu, PU Chunying   

  1. College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2006-11-30 Revised:2007-05-27 Online:2008-03-25 Published:2008-03-25

摘要: 运用相对论性的密度泛函离散变分(DV-Xα)方法模拟计算PbMoO4晶体中可能存在的F型色心的电子结构.结果表明,F,F+心在PbMoO4晶体的禁带中引入了施主能级,其光学跃迁能分别是2.141,2.186 eV,即F,F+心能分别引起PMO晶体中581,567 nm的吸收,该吸收与PbMoO4晶体中580 nm的吸收峰对应.因此,可推断F型色心能引起PMO晶体中由光色效应引起的580 nm吸收.

关键词: PbMoO4, F, F+心, DV-Xα, 电子结构

Abstract: Electronic structures of possible F-type color centers in PbMoO4 crystals are studied within the framework of a fully relativistic selfconsistent Dirac-Slater theory with a numerically discrete variational (DV-Xα) method. The results show that:F and F+ centers result in donor energy levels in forbidden band; optical transition energies are 2.141 eV and 2.186 eV, corresponding to 518 nm and 567 nm absorption, respectivly. The 580 nm absorption band after photo-chromic effect results from F-type color centers in PbMoO4.

Key words: PbMoO4, F,F+ color centers, DV-Xα, electronic structure

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