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arXiv 0711.0872cond-mat.mtrl-scicond-mat.str-el
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半金属铁磁体:从能带结构到多体效应

Half-metallic ferromagnets: From band structure to many-body effects

M. I. Katsnelson, V. Yu. Irkhin, L. Chioncel, A. I. Lichtenstein, R. A. de Groot

摘要:

综述了半金属铁磁体电子结构理论和实验研究的新进展。作为用于一种自旋投影的半导体和用于另一种自旋投影的金属,这些物质是用于自旋电子学(即,自旋相关电子学)。根据HMF的电子结构和化学键的特点,对HMF进行了分类。电子-磁振子相互作用的影响,在HMF和它们的表现在磁性,光谱,热力学和输运性质被认为是。特别关注能隙中非准粒子态的出现,这为电子结构中本质上的多体特征提供了一个有启发性的例子。讨论了相关$d$ -体系的电子计算现状,并对特定HMF(Heusler合金、锌-镍结构化合物、CrO $_{2},$ Fe $_{3}$ O $_{4}$)的计算结果进行了评述。

英文摘要:

A review of new developments in theoretical and experimental electronic structure investigations of half-metallic ferromagnets (HMF) is presented. Being semiconductors for one spin projection and metals for another ones, these substances are promising magnetic materials for applications in spintronics (i.e., spin-dependent electronics). Classification of HMF by the peculiarities of their electronic structure and chemical bonding is discussed. Effects of electron-magnon interaction in HMF and their manifestations in magnetic, spectral, thermodynamic, and transport properties are considered. Especial attention is paid to appearance of non-quasiparticle states in the energy gap, which provide an instructive example of essentially many-body features in the electronic structure. State-of-art electronic calculations for correlated $d$-systems is discussed, and results for specific HMF (Heusler alloys, zinc-blende structure compounds, CrO$_{2},$ Fe$_{3}$O$_{4}$) are reviewed.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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