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.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第2期296-301,共6页
Acta Physica Sinica
基金
国家自然科学基金
