Analytic evidence of the equivalence of the alternating Heisenberg spin chain to the mixed spin (1,1/2) Heisenberg chain

作者：Jiang, Jian-Jun^*; Liu, Yong-Jun; Tang, Fei; Yang, Cui-Hong

来源：Physica B: Condensed Matter , 2011, 406(4): 781-784.

DOI：10.1016/j.physb.2010.11.092

• Heisenberg chain
• Spin-wave excitation
• Sublattice magnetizations
• Local bond energies

We investigated the properties of the spin-1/2 ferromagnetic-antiferromagnetic-antiferromagnetic alternating Heisenberg chain using the spin-wave theory. The spin-wave excitation spectra, the sublattice magnetizations and the local bond energies of the model are calculated to be compared with the corresponding properties of the mixed spin (1, 1/2) chain for a range of alpha.The results demonstrate that all the properties show similar behaviours in the small a limit, so the properties of the mixed spin (1, 1/2) chain can be described using the spin-1/2 ferromagnetic-antiferromagnetic-antiferromagnetic alternating Heisenberg chain.

• 出版日期2011-2-15
• 单位三江学院; 南京信息工程大学; 扬州大学; 扬州市职业大学