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Self-consistent spin fluctuation spectrum and correlated electronic structure of actinides

机译:of系元素的自洽自旋涨落谱和相关电子结构

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摘要

We present an overview of various theoretical methods with detailed emphasis on an intermediate Coulomb- U coupling model. This model is based on material-specific ab initio band structure from which correlation effects are computed via self-consistent GW-based self-energy corrections arising from spin fluctuations. We apply this approach to four isostructural intermetallic actinides PuCoIn_5, PuCoGa_5, PuRhGa_5 belonging to the Pu-115 family, and UCoGa_5 a member of the U-l 15 family. The 115 families share the property of spin-orbit split density of states enabling substantial spin fluctuations around 0.5 eV, whose feedback effect on the electronic structure creates mass renormalization and electronic "hot spots," i.e., regions of large spectral weight. A detailed comparison is provided for the angle-resolved and angle-integrated photoemission spectra and de Haas-van Alphen experimental data as available. The results suggest that this class of actinides is adequately described by the intermediate Coulomb interaction regime, where both itinerant and incoherent features coexist in the electronic structure.
机译:我们对各种理论方法进行了概述,重点是中间库仑-U耦合模型。该模型基于特定于材料的从头算带结构,通过自旋波动产生的基于自一致的基于GW的自能量校正,可以从中计算相关效应。我们将此方法应用于属于Pu-115家族的四个同构金属间act系元素PuCoIn_5,PuCoGa_5,PuRhGa_5和U-15家族的成员UCoGa_5。 115个族具有自旋轨道分裂态密度的性质,使得大约0.5 eV的自旋波动很大,其对电子结构的反馈效应产生了质量重归一化和电子“热点”,即大光谱权重的区域。提供了角度分辨和角度积分的光发射光谱以及de Haas-van Alphen实验数据的详细比较。结果表明,中间的库仑相互作用机制充分描述了这种of系元素,其中电子结构中同时存在流动性和非相干性。

著录项

  • 来源
    《Journal of Materials Research》 |2013年第5期|659-672|共14页
  • 作者单位

    Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545;

    Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545;

    Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
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