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Dynamically induced Fermi arcs and Fermi pockets in two dimensions: A model for underdoped cuprates

机译：二维动态感应的费米弧和费米腔：掺杂不足的铜酸盐的模型

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摘要

We investigate the effects of the dynamic bosonic fluctuations on the Fermi-surface reconstruction in two dimensions as a model for the underdoped cuprates. At energies larger than the boson energy ω_b, the dynamic nature of the fluctuations is not important and the quasiparticle dispersion exhibits the shadow feature like that induced by a static long-range order. At lower energies, however, the shadow feature is pushed away by the finite ω_b. The detailed low-energy features are determined by the bare dispersion and the coupling of quasi-particles to the dynamic fluctuations. We present how these factors reconstruct the Fermi surface to produce the Fermi arcs or the Fermi pockets, or their coexistence. Our principal result is that the dynamic nature of the fluctuations, without invoking a yet-to-be-established translational symmetry breaking hidden order, can produce the Fermi pocket centered away from the (Π/2,Π/2) toward the zone center which may coexist with the Fermi arcs. This is discussed in comparison with the experimental observations.
机译：我们在二维空间中研究了动态玻色子涨落对费米表面重建的影响，作为低掺杂铜酸盐的模型。在大于玻色子能量ω_b的能量下，波动的动态性质并不重要，并且准粒子色散表现出阴影特征，如由静态远程阶跃引起的。然而，在较低的能量下，阴影特征被有限的ω_b推开。详细的低能量特征取决于裸露的色散和准粒子与动态波动的耦合。我们介绍了这些因素如何重构费米表面以产生费米弧或费米凹坑，或它们共存。我们的主要结果是，波动的动态性质，无需调用尚未建立的平移对称性打破隐藏的顺序，就可以产生以（π/ 2，Π/ 2）为中心朝向区域中心的费米口袋。可能与费米弧共存。与实验观察结果进行了讨论。

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  • 来源
    《Physical review》 |2010年第9期|p.094509.1-094509.9|共9页
  • 作者

    Han-Yong Choi; rnSeung Hwan Hong;

  • 作者单位

    Department of Physics and Institute for Basic Science Research, SungKyunKwan University, Suwon 440-746, Korea and School of Physics, Korea Institute for Advanced Study, Seoul 130-722, Korea;

    rnDepartment of Physics and Institute for Basic Science Research, SungKyunKwan University, Suwon 440-746, Korea;

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  • 正文语种 eng
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  • 关键词

    electronic structure;

    机译：电子结构;

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