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首页> 外文期刊>Physical review >Spectroscopic signature of Kondo screening on single adatoms in Na(Fe_(0.96)Co_(0.03)Mn_(0.01))As
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Spectroscopic signature of Kondo screening on single adatoms in Na(Fe_(0.96)Co_(0.03)Mn_(0.01))As

机译:Na(Fe_(0.96)Co_(0.03)Mn_(0.01))As中单个原子的近藤筛选的光谱特征

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摘要

The electronic states of surface adatoms in Na(Fe_(0.96)Co_(0.03)Mn_(0.01))As have been studied by low-temperature scanning tunneling spectroscopy. The spectra recorded on the adatoms display both superconducting coherence peaks and an asymmetric resonance in a larger energy scale. The Fano-type line shape of the spectra points towards a possible Kondo effect at play. The apparent energy position of the resonance peak shifts about 5 me V to the Fermi level when measured across the critical temperature, supporting that the Bogoliubov quasiparticle is responsible for the Kondo screening in the superconducting state. The tunneling spectra do not show the subgap bound states, which is explained as the weak pair breaking effect given by the weak and broad scattering potential after the Kondo screening.
机译:通过低温扫描隧道光谱法研究了Na(Fe_(0.96)Co_(0.03)Mn_(0.01))As中表面原子的电子态。吸附在原子上的光谱在较大的能量范围内显示了超导相干峰和不对称共振。光谱的Fano型线形指向可能的近藤效果。当跨临界温度测量时,共振峰的表观能量位置向费米能级移动约5 me V,这证明了Bogoliubov准粒子负责超导状态下的Kondo筛选。隧道光谱没有显示出亚能级的束缚态,这可以解释为近藤筛选后弱而宽的散射势所赋予的弱成对断裂效应。

著录项

  • 来源
    《Physical review》 |2014年第21期|214515.1-214515.5|共5页
  • 作者单位

    National Laboratory for Superconductivity, Institute of Physics and National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100190, China;

    Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University, Nanjing 210093, China;

    Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University, Nanjing 210093, China;

    Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University, Nanjing 210093, China;

    National Laboratory for Superconductivity, Institute of Physics and National Laboratory for Condensed Matter Physics,Chinese Academy of Sciences, Beijing 100190, China;

    Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University, Nanjing 210093, China;

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  • 正文语种 eng
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  • 关键词

    scanning tunneling microscopy (including chemistry induced with STM); scattering by point defects, dislocations, surfaces, and other imperfections (including kondo effect);

    机译:扫描隧道显微镜(包括用STM诱导的化学反应);由点缺陷;位错;表面和其他缺陷(包括近藤效应)造成的散射;

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