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首页> 外文期刊>Physical review >Itinerant nature of U 5f states in uranium mononitride revealed by angle-resolved photoelectron spectroscopy
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Itinerant nature of U 5f states in uranium mononitride revealed by angle-resolved photoelectron spectroscopy

机译：角度分辨光电子能谱揭示单氮化铀中U 5f态的迭代性质

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摘要

The electronic structure of the antiferromagnet uranium nitride (UN) has been studied by angle-resolved photoelectron spectroscopy (ARPES) using soft x-rays (hv = 420-520 eV). Strongly dispersive bands with large contributions from the U 5f states were observed in ARPES spectra and form Fermi surfaces. The band structure as well as the Fermi surfaces in the paramagnetic phase are well explained by the band-structure calculation treating all the U 5f electrons as being itinerant, suggesting that an itinerant description of the U 5f states is appropriate for this compound. On the other hand, changes in the spectral function due to the antiferromagnetic transition were very small. The shapes of the Fermi surfaces in a paramagnetic phase are highly three-dimensional, and the nesting of Fermi surfaces is unlikely as the origin of the magnetic ordering.
机译：反铁磁体氮化铀（UN）的电子结构已通过使用软X射线（hv = 420-520 eV）的角分辨光电子能谱（ARPES）进行了研究。在ARPES光谱中观察到U 5f态具有很大贡献的强色散带，形成费米表面。通过将所有U 5f电子都视为流动态的能带结构计算，可以很好地解释顺磁相中的能带结构以及费米表面，这表明U 5f态的流动态描述适用于该化合物。另一方面，由于反铁磁跃迁引起的光谱函数变化很小。费米表面在顺磁相中的形状是高度三维的，费米表面的嵌套不太可能成为磁有序的起源。

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  • 来源
    《Physical review》 |2012年第23期|235108.1-235108.8|共8页
  • 作者

    Shin-ichi Fujimori; Takuo Ohkochi; Tetsuo Okane; Yuji Saitoh; Atsushi Fujimori; Hiroshi Yamagami; Yoshinori Haga; Etsuji Yamamoto; Yoshichika Onuki;

  • 作者单位

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan;

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan;

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan;

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan;

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan,Department of 'Physics, University of Tokyo, Hongo, Tokyo 113-0033, Japan;

    Condensed Matter Science Division, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan,Department of Physics, Faculty of Science, Kyoto Sangyo University, Kyoto 603-8555, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan;

    Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan,Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan;

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  • 正文语种 eng
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  • 关键词

    photoemission and photoelectron spectra; strongly correlated electron systems; heavy fermions;

    机译：光发射和光电子光谱;强相关电子系统;重费米子;

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