摘要
采用Jordan-Wigner变换,讨论自旋-1/2铁磁—反铁磁—反铁磁三聚海森堡链系统在外磁场作用下的磁化过程,数值计算了零温下系统的磁化强度随反铁磁相互作用和外磁场的变化关系,结果发现有1/3磁化平台出现,且遵循OYA理论。此外,分析了系统的能隙及磁化平台产生的原因。
The magnetization process of ferromagnetic-antiferromagnetic-antiferromagnetic trimerized quantum chain, under an external magetic field,have been investigated through Jordan-Wigner transformation. At zero temperature, the magnetization as a function of antiferromagnetic interaction and external magnetic field was calculated numeri- cally. It is found that a 1 /3 magnetization plateau of the system is observed,which is consistent with OYA condi- tion. Furthermore,an energy gap,responsible for the 1 /3 magnetization plateau,was discussed.
出处
《武汉工业学院学报》
CAS
2013年第4期52-55,共4页
Journal of Wuhan Polytechnic University
基金
国家自然科学基金资助项目(11204157
11204223)
武汉工业学院科研启动基金资助项目(2011RZ15
2012RZ09)
关键词
三聚链
磁化平台
能隙
Trimerized chain
Magnetization plateau
Energy gap