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Infrared vortex-state electrodynamics in type-Ⅱ superconducting thin films

机译:Ⅱ型超导薄膜的红外涡流态电动力学

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摘要

The vortex-state electrodynamics of s-wave superconductors has been studied by infrared spectroscopy.Far-infrared transmission and reflection spectra of superconducting Nb_(0.5)Ti_(0.5)N and NbN thin films were measured in a magnetic field perpendicular to the film surface, and the optical conductivity was extracted.The data show clear reduction of superconducting signature.We consider the vortex state as a two-component effective medium of normal cores embedded in a BCS superconductor.The spectral features are well explained by the Maxwell Garnett theory.Our analysis supports the presence of magnetic-field-induced pair-breaking effects in the superconducting component outside of the vortex cores.
机译:通过红外光谱研究了S波超导体的涡态电动力学特性,在垂直于薄膜表面的磁场中测量了Nb_(0.5)Ti_(0.5)N和NbN薄膜的远红外透射光谱和反射光谱。数据表明超导信号明显减少,我们认为涡旋状态是BCS超导体中嵌入的普通磁芯的两组分有效介质,其光谱特征可以用麦克斯韦·加内特理论很好地解释。我们的分析支持在涡流核之外的超导组件中存在磁场感应的成对破坏效应。

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  • 来源
    《Physical review》 |2013年第18期|184503.1-184503.5|共5页
  • 作者单位

    Department ofPhysics, University of Florida, Gainesville,Florida 32611, USA,Photon Sciences, Brookhaven National Laboratory, Upton, New York 11973, USA;

    National High Magnetic Field Laboratory, Florida State University,Tallahassee, Florida 32310, USA;

    National High Magnetic Field Laboratory, Florida State University,Tallahassee, Florida 32310, USA;

    Photon Sciences, Brookhaven National Laboratory, Upton, New York 11973, USA;

    Department ofPhysics, University of Florida, Gainesville,Florida 32611, USA;

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

    superconducting films and low-dimensional structures; magnetic properties;

    机译:超导膜和低维结构;磁性;

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