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首页> 外文期刊>Physical review >Normal state charge dynamics of Fe_(1.06)Te_(0.88)S_(0.14) superconductor probed with infrared spectroscopy
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Normal state charge dynamics of Fe_(1.06)Te_(0.88)S_(0.14) superconductor probed with infrared spectroscopy

机译:Fe_(1.06)Te_(0.88)S_(0.14)超导体的红外光谱探测常态电荷动力学

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摘要

We have used optical spectroscopy to probe the normal state electrodynamic response of Fe_(1.06)Te_(0.88)S_(0.14), a member of the 11 family of iron-based superconductors with T_C=8 K. Measurements have been conducted over a wide frequency range (50-50 000 cm~(-1)) at selected temperatures between 10 and 300 K. At low temperatures the material behaves as an "incoherent metal:" a Drude-type peak is absent from the optical conductivity and all optical functions reveal that quasiparticles are not well defined down to the lowest measured temperature. We introduce "generalized spectral weight" analysis and use it to track temperature induced redistribution of spectral weight. Our results, combined with previous reports, indicate that the 11 family of iron-based superconductors might be different from other families.
机译:我们已经使用光学光谱法探测了Fe_(1.06)Te_(0.88)S_(0.14)的正常态电响应,Fe_(1.06)Te_(0.88)S_(0.14)是T_C = 8 K的11族铁基超导体的成员。在10到300 K之间的选定温度下的频率范围(50-50 000 cm〜(-1))。在低温下,该材料表现为“非相干金属”:光电导率和所有光学特性均不存在Drude型峰功能表明,在最低测量温度下,准粒子的定义不明确。我们引入“广义光谱权重”分析,并使用它来跟踪温度引起的光谱权重的重新分布。我们的结果,结合以前的报告,表明11个铁基超导体家族可能与其他家族不同。

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  • 来源
    《Physical review》 |2010年第17期|P.174518.1-174518.5|共5页
  • 作者单位

    Department of Physics and Astronomy, University of Wisconsin Oshkosh, Oshkosh, Wisconsin 54901, USA;

    rnDepartment of Physics, The University of Akron, Akron, Ohio 44325, USA;

    rnDepartment of Physics, The University of Akron, Akron, Ohio 44325, USA;

    rnCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA Ames Laboratory US DOE and Department of Physics and Astronomy, Iowa State University, Ames, IA 50011;

    rnCondensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, New York 11973, USA;

    rnDepartment of Physics, The University of Akron, Akron, Ohio 44325, USA;

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

    infrared and raman spectra;

    机译:红外光谱和拉曼光谱;

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