计算物理 ›› 2014, Vol. 31 ›› Issue (2): 243-246.

• 论文 • 上一篇    下一篇

自旋阻挫三角链的热容量

董会宁1, 李乾春1,2, 李鹏2, 郭龙飞2, 游波2   

  1. 1. 重庆邮电大学数理学院, 重庆 400065;
    2. 四川大学物理系, 成都 610064
  • 收稿日期:2013-04-05 修回日期:2013-09-17 出版日期:2014-03-25 发布日期:2014-03-25
  • 作者简介:李乾春(1987-),男,研究生,E-mail:liqianehunl88@163.com
  • 基金资助:
    国家自然科学基金(11074177);重庆市自然科学基金(2010JJ1454,cstc2012jjB0110)资助项目

Specific Heat of Spin Frustrated Sawtooth Chains

DONG Huining1, LI Qianchun1,2, LI Peng2, GUO Longfei2, YOU Bo2   

  1. 1. Mathematics and Physics, Chongqing University of Posts and Telecommunications, Chongqing 400065, China;
    2. Department of Physics, Sichuan University, Chengdu 610064, China
  • Received:2013-04-05 Revised:2013-09-17 Online:2014-03-25 Published:2014-03-25

摘要: 采用Jordan-Wigner变换和Bogoliubov理论研究三角链的热容量.结果表明,在无外磁场条件下,系统的热容量随阻挫强度的增加双峰结构逐渐消失,这是由于系统二聚化态的反铁磁热力学激发.当阻挫为0.2并加入外场时,系统的热容量曲线的双峰结构消失,这是由于系统长程磁有序的产生.

关键词: 阻挫, 凝聚态, 晶格, 热容

Abstract: We use Jordan-Wigner transform and Bogoliubov theory to study specific heat of triangular chains. In the absence of external magnetic field,it shows that doublet-peak structure disappears gradually as specific heat of a frustration system increases,which is due to antiferromagenetic excitation of spins in dimer state. As frustration is set 0.2 and applied external magenetic field,disappearence of specific heat double structure is due to occurrence of long-range magnetic order.

Key words: frustration, condensed matter, lattice, specific heat

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