计算物理 ›› 2012, Vol. 29 ›› Issue (5): 786-790.

• 论文 • 上一篇    

BaTi2As2O电子结构的第-性原理研究

轩书科   

  1. 山东工艺美术学院公共课教学部, 山东 济南 250014
  • 收稿日期:2011-11-28 修回日期:2012-04-05 出版日期:2012-09-25 发布日期:2012-09-25
  • 作者简介:轩书科(1970-),男,山东济南,讲师,硕士,从事计算物理和物理课程教学等方面的研究,E-mail:shukel58@126.com

First Principles Study of Electronic Structure of BaTi2As2O

XUAN Shuke   

  1. Department of Common Courses, Shandong University of Art and Design, Jinan 250014, China
  • Received:2011-11-28 Revised:2012-04-05 Online:2012-09-25 Published:2012-09-25

摘要: 利用基于密度泛函理论的平面波赝势方法,研究BaTi2As2O的能带结构、费米面和态密度.发现:BaTi2As2O是一种非磁性金属,费米能级处的态密度主要来自Ti原子的3d电子,Ti 3d轨道和As 4p轨道有较强的杂化.没有发现其磁性基态,说明Ti原子上没有局域磁矩,与Pickett对Na2Ti2Sb2O的研究结论相吻合.

关键词: 第一性原理, 电子结构, 磁序, BaTi2As2O

Abstract: With plane wave vectors and pseudopotential method within the fbme of density functional theory.we study band structure,Fermi surfaces and density of state of BaTi2As2O.It is found that BaTi2As2O is a nonmagnetic metal and density of state at Fermi level is dominated by Ti 3d electrons.Ti 3d orbitals are hybridized with As 4p orbitals strongly rather than O 2p orbitals.A magnetic ground state of BaTi2As2O is not found,which is consistent with a study on Na2Ti2Sb2O by Pickett.

Key words: first principle calculation, electronic structure, magnetic ordering, BaTi2As2O

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