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首页> 外文期刊>Physical review >Fermi surfaces and orbital polarization in superconducting CeO_(0.5)F_(0.5)BiS_2 revealed by angle-resolved photoemission spectroscopy
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Fermi surfaces and orbital polarization in superconducting CeO_(0.5)F_(0.5)BiS_2 revealed by angle-resolved photoemission spectroscopy

机译:角分辨光发射光谱法揭示超导CeO_(0.5)F_(0.5)BiS_2中的费米面和轨道极化

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摘要

We have investigated the electronic structure of BiS_2-based CeO_(0.5)F_(0.5)BiS_2 superconductor using polarization-dependent angle-resolved photoemission spectroscopy (ARPES), and succeeded in elucidating the orbital characters on the Fermi surfaces. In the rectangular Fermi pockets around the X point, the straight portion parallel to the k_y direction is dominated by Bi 6_(px) character. The orbital polarization indicates the underlying quasi-one-dimensional electronic structure of the BiS_2 system. Moreover, distortions on tetragonally aligned Bi could give rise to the band Jahn-Teller effect.
机译:我们已经研究了基于Bis_2的CeO_(0.5)F_(0.5)BiS_2超导体的电子结构,该技术使用了偏振相关的角分辨光发射光谱(ARPES),并成功地阐明了费米表面的轨道特征。在X点周围的矩形Fermi凹穴中,平行于k_y方向的笔直部分由Bi 6_(px)字符控制。轨道极化表明BiS_2系统的基本准一维电子结构。此外,四边形排列的Bi的畸变会引起能带Jahn-Teller效应。

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  • 来源
    《Physical review》 |2015年第4期|041113.1-041113.5|共5页
  • 作者单位

    Department of Physics and Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha 277-8561, Japan;

    Department of Physics and Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha 277-8561, Japan;

    Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom;

    Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom,Nanogune and DIPC, Tolosa Hiribidea 76, 20018 San Sebastian, Spain,Basque Foundation for Science, Ikerbasque, 48011 Bilbao, Spain;

    Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan;

    Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan;

    Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan;

    Hiroshima Synchrotron Radiation Center, Hiroshima University, Higashihiroshima 739-0046, Japan,Graduate School of Science, Hiroshima University, Higashihiroshima 739-8526, Japan;

    Department of Physics and Complexity Science and Engineering, University of Tokyo, 5-1-5 Kashiwanoha 277-8561, Japan;

    Dipartimento di Fisica, Universita di Roma 'La Sapienza'-Piazzale Aldo Mow 2, 00185 Roma, Italy;

    Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan;

    Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan;

    Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan;

    Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan;

    Department of Applied Physics, Waseda University, Tokyo 169-8555, Japan;

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

    electronic structure; X-ray absorption spectra; narrow-band systems; intermediate-valence solids;

    机译:电子结构X射线吸收光谱;窄带系统;中价固体;

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