中国物理B ›› 2013, Vol. 22 ›› Issue (8): 87402-087402.doi: 10.1088/1674-1056/22/8/087402

所属专题: TOPICAL REVIEW — Iron-based high temperature superconductors

• TOPICAL REVIEW—Iron-based high temperature superconductors • 上一篇    下一篇

Spin, charge, and orbital orderings in iron-based superconductors

江庆, 康耀太, 姚道新   

  1. State Key Laboratory of Optoelectronic Materials and Technology, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
  • 收稿日期:2013-06-14 修回日期:2013-06-23 出版日期:2013-06-27 发布日期:2013-06-27
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB821400), the National Natural Science Foundation of China (Grant Nos. 11074310 and 11275279), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110171110026), and the Program for New Century Excellent Talents in University, China (Grant No. NCET-11-0547).

Spin, charge, and orbital orderings in iron-based superconductors

Jiang Qing (江庆), Kang Yao-Tai (康耀太), Yao Dao-Xin (姚道新)   

  1. State Key Laboratory of Optoelectronic Materials and Technology, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou 510275, China
  • Received:2013-06-14 Revised:2013-06-23 Online:2013-06-27 Published:2013-06-27
  • Contact: Yao Dao-Xin E-mail:yaodaoxin@gmail.com
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No. 2012CB821400), the National Natural Science Foundation of China (Grant Nos. 11074310 and 11275279), the Specialized Research Fund for the Doctoral Program of Higher Education, China (Grant No. 20110171110026), and the Program for New Century Excellent Talents in University, China (Grant No. NCET-11-0547).

摘要: In this article, we briefly review spin, charge, and orbital orderings in iron-based superconductors, as well as the multi-orbital models. The interplay of spin, charge, and orbital orderings is a key to understand the high temperature superconductivity. As an illustration, we use the two-orbital model to show the spin and charge orderings in iron-based superconductors based on the mean-field approximation in real space. The typical spin and charge orderings are shown by choosing appropriate parameters, which are in good agreement with experiments. We also show the effect of Fe vacancies, which can introduce the nematic phase and interesting magnetic ground states. The orbital ordering is also discussed in iron-based superconductors. It is found that disorder may play a role to produce the superconductivity.

关键词: iron-based superconductors, multi-orbital models, magnetic ordering, charge stripe

Abstract: In this article, we briefly review spin, charge, and orbital orderings in iron-based superconductors, as well as the multi-orbital models. The interplay of spin, charge, and orbital orderings is a key to understand the high temperature superconductivity. As an illustration, we use the two-orbital model to show the spin and charge orderings in iron-based superconductors based on the mean-field approximation in real space. The typical spin and charge orderings are shown by choosing appropriate parameters, which are in good agreement with experiments. We also show the effect of Fe vacancies, which can introduce the nematic phase and interesting magnetic ground states. The orbital ordering is also discussed in iron-based superconductors. It is found that disorder may play a role to produce the superconductivity.

Key words: iron-based superconductors, multi-orbital models, magnetic ordering, charge stripe

中图分类号:  (Properties of superconductors)

  • 74.25.-q
74.70.Xa (Pnictides and chalcogenides) 74.20.-z (Theories and models of superconducting state) 74.25.Ha (Magnetic properties including vortex structures and related phenomena)