Universal low-temperature properties of frustrated classical spin chain near the ferromagnet-helimagnet transition point

被引:11
作者
Dmitriev, D. V. [1 ]
Krivnov, V. Ya [1 ]
机构
[1] Russian Acad Sci, Joint Inst Chem Phys, Moscow 119334, Russia
关键词
STATES; MODEL;
D O I
10.1140/epjb/e2011-10664-6
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The thermodynamics of the classical frustrated spin chain near the transition point between the ferromagnetic and the helical phases is studied. The calculation of the partition and spin correlation functions at low temperature limit is reduced to the quantum mechanical problem of a particle in potential well. It is shown that the thermodynamic quantities are universal functions of the temperature normalized by the chiral domain wall energy. The obtained behavior of the static structure factor indicates that the short-range helical-type correlations existing at low temperatures on the helical side of the transition point disappear at some critical temperature, defining the Lifshitz point. It is also shown that the low-temperature susceptibility in the helical phase near the transition point has a maximum at some temperature. Such behavior is in agreement with that observed in several materials described by the quantum s = 1/2 version of this model.
引用
收藏
页码:123 / 131
页数:9
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