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arXiv 0907.3732cond-mat.str-elcond-mat.supr-conhep-th
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金属中的涨落自旋密度波

Fluctuating spin density waves in metals

Subir Sachdev, Max A. Metlitski, Yang Qi, Cenke Xu

摘要:

最近的工作已经使用U(1)规范理论来描述费米口袋的物理在波动的自旋密度波阶的存在。我们将这一理论推广到任意的能带结构和有序波矢。通过将U(1)规范理论嵌入SU(2)规范理论中,描述了到大费米表面态的跃迁,其中没有局域自旋密度波序诱导的口袋. SU(2)规范理论的相图表明,费米液体中自旋密度波序的开始要么直接发生在赫兹讨论的框架中,要么通过费米表面的分数激发的中间非费米液相发生。我们讨论了我们的结果的应用到铜酸盐的相图。

英文摘要:

Recent work has used a U(1) gauge theory to describe the physics of Fermi pockets in the presence of fluctuating spin density wave order. We generalize this theory to an arbitrary band structure and ordering wavevector. The transition to the large Fermi surface state, without pockets induced by local spin density wave order, is described by embedding the U(1) gauge theory in a SU(2) gauge theory. The phase diagram of the SU(2) gauge theory shows that the onset of spin density wave order in the Fermi liquid occurs either directly, in the framework discussed by Hertz, or via intermediate non-Fermi liquid phases with Fermi surfaces of fractionalized excitations. We discuss application of our results to the phase diagram of the cuprates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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