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Probing the pairing symmetry of the iron pnictides with electronic Raman scattering

机译:用电子拉曼散射探测铁肽的配对对称性

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摘要

An important issue in the study of the iron-arsenic-based superconductors is the symmetry of the superconducting gap, a problem complicated by multiple gaps on different Fermi-surface sheets. Electronic Raman scattering is a flexible bulk probe which allows one in principle to determine gap magnitudes and test for gap nodes in different regions of the Brillouin zone by employing different photon polarization states. Here we calculate the clean Raman intensity for A_(1g), B_(1g), and B_(2g) polarizations and discuss the peak structures and low-energy power laws which might be expected for several popular models of the superconducting gap in these systems.
机译:铁-砷基超导体研究中的一个重要问题是超导间隙的对称性,该问题由于在不同费米表面板上的多个间隙而变得复杂。电子拉曼散射是一种灵活的体探针,从原理上讲,它可以通过使用不同的光子极化态来确定间隙幅度并测试布里渊区不同区域中的间隙节点。在这里,我们计算A_(1g),B_(1g)和B_(2g)极化的纯净拉曼强度,并讨论了这些系统中几种流行的超导间隙模型可能期望的峰值结构和低能量幂律。

著录项

  • 来源
    《Physical review》 |2009年第17期|174521.1-174521.8|共8页
  • 作者单位

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

    SLAC National Accelerator Laboratory, Stanford Institute for Materials and Energy Sciences, 2575 Sand Hill Road, Menlo Park, California 94025, USA Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA;

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

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

    Department of Physics, University of California, Santa Barbara, California 93106-9530, USA;

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

    pairing symmetries (other than s-wave); infrared and raman spectra; optical properties; superconducting materials;

    机译:配对对称性(s波除外);红外和拉曼光谱;光学性质超导材料;

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