反铁磁链的自旋Peierls相变  

SPIN PEIERLS TRANSITION OF THE ANTIFERROMAGNETIC CHAIN 

作　　者：王治国[1] 丁国辉[1] 许伯威 

机构地区：[1]上海交通大学应用物理系

出　　处：《物理学报》1999年第2期296-301,共6页Acta Physica Sinica

基　　金：国家自然科学基金

摘　　要：通过费米玻色变换将一维自旋１／２反铁磁链映射为连续玻色场形式，讨论了模型基态能量和激发态能量，证明了此系统存在自旋Ｐｅｉｅｒｌｓ相变．并给出了模型基态能量密度与晶格畸变大小的关系．Abstract By using the Fermi Bose transformation, the antiferromagnetic chain is mapped into the bosonic field, and the energy density of the ground state and the excite states of the model are given. The relationship between the energy density of the ground state and the strength of distortion of the model is obtained. The results show that there exists a spin Peierls transition in the model. Finally, the numerical simulation is performed to verify the above theoretical prediction.

关 键 词：自旋 P-相变 反铁磁链 F-P变换 

分 类 号：O413.3[理学—理论物理] O482.525[理学—物理]