7a-T-2 Microscopic Electron Models with Exact SO (5) Symmetry
7a-T-2 Microscopic Electron Models with Exact SO (5) Symmetry
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7a-T-2 具有精确 SO (5) 对称性的微观电子模型
DOI：
10.1103/physrevlett.80.3586
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发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Shoucheng Zhang
中科院分区：
文献类型：
--
作者：
S. Rabello;H. Kohno;E. Demler;Shoucheng Zhang
我们构造了一类反铁磁和d波超导基态之间具有精确SO（5）对称性的微观电子模型。在这两个阶段中，单粒子和集体激发之间存在精确的一一对应关系。SO（5）对称破缺项可以根据精确SO（5）代数的不可约表示来引入和分类。得到的相图和集体模与SO（5）非线性σ模型的相图和集体模相同。
We construct a class of microscopic electron models with exact SO(5) symmetry between antiferromagnetic and d-wave superconducting ground states. There is an exact one-to-one correspondence between both single-particle and collective excitations in both phases. SO(5) symmetry breaking terms can be introduced and classified according to irreducible representations of the exact SO(5) algebra. The resulting phase diagram and collective modes are identical to that of the SO(5) nonlinear sigma model.