Low-lying excitations and magnetization process of coupled tetrahedral systems
Low-lying excitations and magnetization process of coupled tetrahedral systems
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DOI：
10.1103/physrevb.66.054435
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发表时间：
2002-07
影响因子：
3.7
通讯作者：
K. Totsuka;H. Mikeska
中科院分区：
文献类型：
--
作者：
K. Totsuka;H. Mikeska
我们研究了低位单重态和三重态激发以及由四面体自旋簇组成的准一维自旋系统的磁化过程。对于一类这样的模型，我们发现了各种精确的低位激励；其中一些负责由局部单线态形成的两个不同基态之间的一阶跃迁。此外，我们发现存在两种不同类型的磁化平台，它们由一阶转变分开。
We investigate low-lying singlet and triplet excitations and the magnetization process of quasi-one-dimensional spin systems composed of tetrahedral spin clusters. For a class of such models, we found various exact low-lying excitations; some of them are responsible for the first-order transition between two different ground states formed by local singlets. Moreover, we find that there are two different kinds of magnetization plateaus which are separated by a first-order transition.