中国物理B ›› 2017, Vol. 26 ›› Issue (2): 27102-027102.doi: 10.1088/1674-1056/26/2/027102

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Structural, electronic, optical, and magnetic properties of Co-doped Cu2O

I Djabri, T Rezkallah, F Chemam   

  1. Laboratoire de la Physique Appliquée et Théorique, Département des Sciences de la matiére, Université Laarbi tebessi, tebessa, Algérie
  • 收稿日期:2016-08-19 修回日期:2016-10-30 出版日期:2017-02-05 发布日期:2017-02-05
  • 通讯作者: F Chemam E-mail:fchemam@gmail.com

Structural, electronic, optical, and magnetic properties of Co-doped Cu2O

I Djabri, T Rezkallah, F Chemam   

  1. Laboratoire de la Physique Appliquée et Théorique, Département des Sciences de la matiére, Université Laarbi tebessi, tebessa, Algérie
  • Received:2016-08-19 Revised:2016-10-30 Online:2017-02-05 Published:2017-02-05
  • Contact: F Chemam E-mail:fchemam@gmail.com

摘要: We investigate the magnetic properties of Co-doped Cu2O. We studied first the electronic and structural properties of Cu2O using the optimization of the lattice constant which is 4.18 Å. The calculated gap is found between 0.825 eV and 1.5 eV, these values are in good agreement with the experimental results. The Co atoms are inserted in Cu2O by means of the density functional theory (DFT) using LSDA, LSDA+U, and LSDA+MBJ approximations in the WIEN2k code, based on the supercell model by setting up 12, 24, and 48 atoms in (1×1×2), (1×2×2), and (2×2×2) supercells respectively with one or two copper atoms being replaced by cobalt atoms. The energy difference between the ferromagnetic and anti-ferromagnetic coupling of the spins located on the substitute Co has been calculated in order to obtain better insight into the magnetic exchange coupling for this particular compound. The studied compound exhibits stable integer magnetic moments of 2 μB and 4 μB when it is doped with 2 atoms of Co. Optical properties have also been worked out. The results obtained in this study demonstrate the importance of the magnetic effect in Cu2O.

关键词: Cu2O, electronic structure, magnetic properties, optical properties

Abstract: We investigate the magnetic properties of Co-doped Cu2O. We studied first the electronic and structural properties of Cu2O using the optimization of the lattice constant which is 4.18 Å. The calculated gap is found between 0.825 eV and 1.5 eV, these values are in good agreement with the experimental results. The Co atoms are inserted in Cu2O by means of the density functional theory (DFT) using LSDA, LSDA+U, and LSDA+MBJ approximations in the WIEN2k code, based on the supercell model by setting up 12, 24, and 48 atoms in (1×1×2), (1×2×2), and (2×2×2) supercells respectively with one or two copper atoms being replaced by cobalt atoms. The energy difference between the ferromagnetic and anti-ferromagnetic coupling of the spins located on the substitute Co has been calculated in order to obtain better insight into the magnetic exchange coupling for this particular compound. The studied compound exhibits stable integer magnetic moments of 2 μB and 4 μB when it is doped with 2 atoms of Co. Optical properties have also been worked out. The results obtained in this study demonstrate the importance of the magnetic effect in Cu2O.

Key words: Cu2O, electronic structure, magnetic properties, optical properties

中图分类号:  (Density functional theory, local density approximation, gradient and other corrections)

  • 71.15.Mb
71.20.-b (Electron density of states and band structure of crystalline solids) 75.50.Pp (Magnetic semiconductors) 78.66.-w (Optical properties of specific thin films)