Phase diagram of fragmented SU(2)-invariant spin ladders

被引：3
作者：
Albertini, G [1 ]
机构：
[1] Univ Milan, Dipartimento Fis, I-20133 Milan, Italy
来源：
PHYSICAL REVIEW B | 2001年 / 64卷 / 09期
关键词：
D O I：
10.1103/PhysRevB.64.094416
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A two-parameter family of quantum spin ladders with local bilinear and biquadratic interactions. solvable by mapping onto fragments of integrable spin I 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 I chain.
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页数：11
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