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Resonance effects due to the excitation of surface Josephson plasma waves in layered superconductors

机译:层状超导体中表面约瑟夫森等离子体波的激发引起的共振效应

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摘要

We analytically examine the excitation of surface Josephson plasma waves (SJPWs) in layered superconductors by an incident electromagnetic wave. The mechanism of excitation is related to the diffraction of the incident wave due to a small periodic modulation in the ab plane of the maximum c-axis Josephson current density. We show that the absorption of the incident wave can be substantially increased, for certain incident angles, due to the resonance excitation of SJPWs. The absorption increase is accompanied by a decrease in the specular reflection. Moreover, we find the dependence of the resonance value of the incident angle on the parameters of the superconductor and the frequency of the incident wave, and the depth of the modulations guaranteeing the total absorption (and total suppression of the specular reflection). Numerical examples of the resonance effects are presented for Bi2212 superconductors.
机译:我们分析入射电磁波对层状超导体中表面约瑟夫森等离子体波(SJPWs)的激发。由于最大c轴约瑟夫森电流密度的ab平面中的小周期调制,激发的机制与入射波的衍射有关。我们显示,由于SJPW的共振激发,对于某些入射角,入射波的吸收可以大大增加。吸收增加伴随着镜面反射的减少。此外,我们发现入射角的共振值与超导体的参数和入射波的频率有关,并且调制深度保证了总吸收(并完全抑制了镜面反射)。给出了Bi2212超导体共振效应的数值示例。

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  • 来源
    《Physical review》 |2009年第21期|214501.1-214501.8|共8页
  • 作者单位

    Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan A.Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine;

    A.Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine;

    A.Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine;

    A.Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine;

    A.Ya. Usikov Institute for Radiophysics and Electronics, Ukrainian Academy of Sciences, 61085 Kharkov, Ukraine;

    Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom;

    Advanced Science Institute, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-0198, Japan Department of Physics, Center for Theoretical Physics, Applied Physics Program, Center for the Study of Complex Systems, University of Michigan, Ann Arbor, Michigan 48109-1040, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    multilayers; superlattices; heterostructures; tunneling phenomena; point contacts; weak links; josephson effects; Bi-based cuprates;

    机译:多层超晶格异质结构隧道现象;点接触;薄弱环节;约瑟夫森效应;双基铜;

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