自旋阻挫三角链的热容量  

Specific Heat of Spin Frustrated Sawtooth Chains

作　　者：董会宁[1] 李乾春[1,2] 李鹏[2] 郭龙飞[2] 游波[2] 

机构地区：[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

出　　处：《计算物理》2014年第2期243-246,共4页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(11074177);重庆市自然科学基金(2010JJ1454;cstc2012jjB0110)资助项目

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.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 exciiation 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.

关 键 词：阻挫 凝聚态 晶格 热容 

分 类 号：O570[理学—粒子物理与原子核物理]