交替键反铁磁Heisenberg链的元激发谱  

Elementary Excitations of Bond-Altemating Antiferromagnetic Heisenberg Chain

作　　者：江学范[1] 

机构地区：[1]常熟高等专科学校物理系,常熟市215500

出　　处：《常熟高专学报》1999年第2期49-52,共4页Journal of Changshu College

基　　金：江苏省教委自然科学基金

摘　　要：在连续表示下研究了线性交替键反铁磁Heisenberg链的基态性质，应用自洽场近似给出了免激发谱的解析结果，讨论了能隙随交替参量变化的数值关系．A linear bond-alternating antiferromagnetic Heisenberg chain is investigated on the base of the continuous representation of the medel Harniltonian. Analytica result of excitation spectrurn is derived in a selfconsistent-field aPproach at zero temperature. Numerical results of the energy gap as a function of alternation paraxneter δare Presented and compared with from other approaches.

关 键 词：交替键 反铁磁链 元激发谱 HEISENBERG链 

分 类 号：O482.525[理学—固体物理]