Systematic low-energy effective theory for magnons and charge carriers in an antiferromagnet
Systematic low-energy effective theory for magnons and charge carriers in an antiferromagnet
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反铁磁体中磁振子和载流子的系统低能有效理论
DOI：
10.1016/j.nuclphysb.2005.09.004
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
U. Wiese
中科院分区：
文献类型：
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作者：
F. Kampfer;M. Moser;U. Wiese
通过电子或空穴掺杂，量子反铁磁体可以转变为高温超导体。反铁磁体的低能动力学由它们的南武-戈德斯通玻色子（即磁振子）控制，并由类似于强相互作用物理学中π介子的手征微扰理论的有效场论描述。与重子手征微扰理论（介子和核子的有效理论）类似，我们建立了一个系统的反铁磁体中磁振子和电子或空穴的低能有效理论。有效理论具有普遍性，并且对整个反铁磁铜酸盐类别进行了模型独立的预测。我们提出了一个详细的分析哈伯德模型的对称性，并讨论这些对称性如何体现在有效的理论。一个完整的线性无关的有效行动的主导贡献的集合被构造。还研究了与外部电磁场的耦合。
By electron or hole doping quantum antiferromagnets may turn into high-temperature superconductors. The low-energy dynamics of antiferromagnets are governed by their Nambu–Goldstone bosons—the magnons—and are described by an effective field theory analogous to chiral perturbation theory for the pions in strong interaction physics. In analogy to baryon chiral perturbation theory—the effective theory for pions and nucleons—we construct a systematic low-energy effective theory for magnons and electrons or holes in an antiferromagnet. The effective theory is universal and makes model-independent predictions for the entire class of antiferromagnetic cuprates. We present a detailed analysis of the symmetries of the Hubbard model and discuss how these symmetries manifest themselves in the effective theory. A complete set of linearly independent leading contributions to the effective action is constructed. The coupling to external electromagnetic fields is also investigated.
DOI：
10.1007/bf01303701
发表时间：
1986-01-01
期刊：
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER
影响因子：
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作者：
BEDNORZ, JG;MULLER, KA
通讯作者：
MULLER, KA