Phase diagram of fragmented SU ( 2 ) -invariant spin ladders
Phase diagram of fragmented SU ( 2 ) -invariant spin ladders
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碎片化SU(2)-不变自旋梯的相图
DOI：
10.1103/physrevb.64.094416
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发表时间：
2001
影响因子：
3.7
通讯作者：
G. Albertini
中科院分区：
文献类型：
--
作者：
G. Albertini
研究了具有局部双线性和双二次相互作用的量子自旋梯的双参数族，可通过映射到可积自旋 1 链的片段来求解。讨论了由四个相组成的相图、基态特性和一些激励。显示出现了不同周期性的调制结构，特别是三聚相。一些结果被扩展到与最一般的自旋 1 链相关的梯子。
A two-parameter family of quantum spin ladders with local bilinear and biquadratic interactions, solvable by mapping onto fragments of integrable spin 1 chains, is studied. Phase diagram, consisting of four phases, ground state properties, and some excitations are discussed. Modulated structures of different periodicity, in particular a trimerized phase, are shown to appear. Some results are extended to the ladder associated to the most general spin 1 chain.