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Luttinger-volume violating Fermi liquid in the pseudogap phase of the cuprate superconductors

机译：铜酸盐超导体假间隙相中违反Luttinger体积的费米液体

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摘要

Based on the NMR measurements on Bi_2Sr_(2-x)La_xCuO_(6+δ) (La-Bi2201) in strong magnetic fields, we identify the nonsuperconducting pseudogap phase in the cuprates as a Luttinger-volume violating Fermi liquid (LvvFL). This state is a zero-temperature quantum liquid that does not break translational symmetry, and yet, the Fermi surface encloses a volume smaller than the large one given by the Luttinger theorem. The particle number enclosed by the small Fermi surface in the LvvFL equals the doping level p, not the total electron number n_e = 1 - p. Both the phase string theory and the dopon theory are introduced to describe the LvvFL. For the dopon theory, we can obtain a semiquantitative agreement with the NMR experiments.
机译：基于在强磁场中Bi_2Sr_（2-x）La_xCuO_（6 +δ）（La-Bi2201）的NMR测量，我们将铜酸盐中的非超导伪隙相鉴定为违反Luttinger体积的费米液体（LvvFL）。这种状态是不会破坏平移对称性的零温度量子液体，但费米表面围成的体积小于卢汀格定理给出的大体积。 LvvFL中被小的费米表面包围的粒子数等于掺杂能级p，而不是总电子数n_e = 1-p。引入相串理论和dopon理论来描述LvvFL。对于dopon理论，我们可以通过NMR实验获得半定量一致性。

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  • 来源
    《Physical review》 |2012年第13期|p.134519.1-134519.7|共7页
  • 作者

    Jia-Wei Mei; Shinji Kawasaki; Guo-Qing Zheng; Zheng-Yu Weng; Xiao-Gang Wen;

  • 作者单位

    Institute for Advanced Study, Tsinghua University, Beijing 100084, P. R. China,Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

    Department of Physics, Okayama University, Okayama 700-8530, Japan;

    Department of Physics, Okayama University, Okayama 700-8530, Japan,Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China;

    Institute for Advanced Study, Tsinghua University, Beijing 100084, P. R. China;

    Institute for Advanced Study, Tsinghua University, Beijing 100084, P. R. China,Department of Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;

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  • 正文语种 eng
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  • 关键词

    cuprate superconductors (high-Tc and insulating parent compounds);

    机译：铜酸盐超导体（高Tc和绝缘母体化合物）;

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