›› 2015, Vol. 24 ›› Issue (2): 27502-027502.doi: 10.1088/1674-1056/24/2/027502

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

Schwinger-boson approach to anisotropy ferrimagnetic chain with bond alternation

李殷翔a, 陈斌b   

  1. a Business School, University of Shanghai for Science and Technology, Shanghai 200093, China;
    b Tin Ka-Ping College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 收稿日期:2014-08-29 修回日期:2014-10-09 出版日期:2015-02-05 发布日期:2015-02-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10774035) and the Qianjiang RenCai Program of Zhejiang Province, China (Grant No. 2007R0010).

Schwinger-boson approach to anisotropy ferrimagnetic chain with bond alternation

Li Yin-Xiang (李殷翔)a, Chen Bin (陈斌)b   

  1. a Business School, University of Shanghai for Science and Technology, Shanghai 200093, China;
    b Tin Ka-Ping College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2014-08-29 Revised:2014-10-09 Online:2015-02-05 Published:2015-02-05
  • Contact: Li Yin-Xiang E-mail:yinxiangl@hotmail.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10774035) and the Qianjiang RenCai Program of Zhejiang Province, China (Grant No. 2007R0010).

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摘要： We use the Schwinger-boson approach to study the anisotropy ferrimagnetic spin-(1/2,1) chain with bond alternation. Based on the effect of bond alternation δ, we obtain energy gap, free energy, and specific heat, respectively. The specific heat with larger bond alternation (δ>0.7) displays a peak at low temperature. Based on the effect of XXZ anisotropy parameter Δ, we present excited spectrums, free energy, and specific heat, respectively.

关键词: Schwinger-boson approach, bond alternation, XXZ anisotropy, ferrimagnetic spin chain

Abstract: We use the Schwinger-boson approach to study the anisotropy ferrimagnetic spin-(1/2,1) chain with bond alternation. Based on the effect of bond alternation δ, we obtain energy gap, free energy, and specific heat, respectively. The specific heat with larger bond alternation (δ>0.7) displays a peak at low temperature. Based on the effect of XXZ anisotropy parameter Δ, we present excited spectrums, free energy, and specific heat, respectively.

Key words: Schwinger-boson approach, bond alternation, XXZ anisotropy, ferrimagnetic spin chain

中图分类号:  (Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.))

  • 75.40.Cx
75.50.Gg (Ferrimagnetics)