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首页> 外文期刊>Physical review letters >Electron-Phonon Coupling in High-Temperature Cuprate Superconductors Determined from Electron Relaxation Rates
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Electron-Phonon Coupling in High-Temperature Cuprate Superconductors Determined from Electron Relaxation Rates

机译:由电子弛豫率确定的高温铜酸盐超导体中的电子声子耦合

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摘要

We determined electronic relaxation times via pump-probe optical spectroscopy using sub-15 fs pulses for the normal state of two different cuprate superconductors. We show that the primary relaxation process is the electron-phonon interaction and extract a measure of its strength, the second moment of the Eliashberg function λ(ω~2) = 800 ± 200 meV~2 for La_(1.85)Sr_(0.15)CuO_4 and λ(ω~2) = 400 ± 100 meV~2 for YBa_2Cu_3O_(6.5). These values suggest a possible fundamental role of the electron-phonon interaction in the superconducting pairing mechanism.
机译:我们通过泵浦探针光谱法使用亚15 fs脉冲确定两种不同的铜酸盐超导体的正常状态下的电子弛豫时间。我们表明,主要弛豫过程是电子-声子相互作用,并提取了其强度的度量,对于La_(1.85)Sr_(0.15),Eliashberg函数λ(ω〜2)= 800±200 meV〜2的第二矩对于YBa_2Cu_3O_(6.5),CuO_4和λ(ω〜2)= 400±100 meV〜2。这些值表明电子-声子相互作用在超导配对机制中可能的基本作用。

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  • 来源
    《Physical review letters》 |2010年第25期|p.257001.1-257001.4|共4页
  • 作者单位

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia,Department of Physics, Loughborough University, Loughborough LE11 3TU, United Kingdom;

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;

    Department of Physics, Shanghai Jiao Tong University, Shanghai 200240, China;

    National Laboratory for Ultrafast and Ultraintense Optical Science, INFM-CNR, Dipartimento di Fisica, Politecnico di Milano, 20133 Milano, Italy;

    National Laboratory for Ultrafast and Ultraintense Optical Science, INFM-CNR, Dipartimento di Fisica, Politecnico di Milano, 20133 Milano, Italy;

    National Laboratory for Ultrafast and Ultraintense Optical Science, INFM-CNR, Dipartimento di Fisica, Politecnico di Milano, 20133 Milano, Italy;

    Department of Complex Matter, Jozef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;

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

    optical properties, polarons and electron-phonon interactions; cuprate superconductors (high-Tc and insulating parent compounds);

    机译:光学性质;极化子和电子-声子相互作用;铜酸盐超导体(高Tc和绝缘母体化合物);

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