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Domain walls in normal and superconducting states of iron pnictides

机译:铁肽在正常和超导状态下的畴壁

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摘要

The electronic and magnetic structures in the normal and superconducting states of iron pnictides are investigated by solving self-consistently the Bogoliubov-de Gennes equation. It is shown that strong electron correlations can induce domain walls, which separate the regions with different spin density wave orders. At zero or low electron doping, 90° domain walls are robust against the on-site Coulomb interaction and Hund coupling. On the domain walls, there always exist larger electron densities. The results agree qualitatively with recent observations of scanning tunneling microscopy and superconducting quantum interference device microscopy in underdoped (Ba,Ca)(Fe_(1-x)Co_x)_2As_2.
机译:通过自洽求解Bogoliubov-de Gennes方程,研究了铁素体铁在常态和超导状态下的电子和磁性结构。结果表明,强电子相关性可以诱导畴壁,该畴壁将具有不同自旋密度波级的区域分开。在零或低电子掺杂下,90°畴壁对现场库仑相互作用和洪德耦合具有鲁棒性。在畴壁上,总是存在较大的电子密度。结果与在掺杂不足的(Ba,Ca)(Fe_(1-x)Co_x)_2As_2中的扫描隧道显微镜和超导量子干涉器件显微镜的最新观察在质量上吻合。

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  • 来源
    《Physical review》 |2011年第13期|p.134517.1-134517.6|共6页
  • 作者单位

    Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, USA,Department of Physics, Shanghai University, Shanghai 200444, China;

    Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, USA;

    Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, USA,College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;

    Texas Center for Superconductivity and Department of Physics, University of Houston, Houston, Texas 77204, USA;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    roperties of type Ⅰand type Ⅱsuperconductors; inhomogeneous superconductors and superconducting systems; domain walls and domain structure;

    机译:Ⅰ型和Ⅱ型超导体的性能;不均匀的超导体和超导系统;畴壁和畴结构;

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